Best Battery Ultrasonic Toothbrushes in 2026

40,000 VPM Smart Toothbrush – Beauty, brains and power. AquaSonic Vibe Series is a world class modern electric toothbrush packed with the most up to date technology in sleek awe-inducing colors. It features an ultra-powerful and industry leading motor producing 40,000 vibrations per minute, ultra-fast wireless charging, 4 mode operation, smart vibration timers, 8 DuPont engineered brush heads, and a travel case; all with a sleek, ultra-slim, lightweight and IPX7 waterproof design.

Accepted by the American Dental Association (ADA) Council on Scientific Affairs – We put our money where your mouth is. Investing in premium oral care technologies has earned the Vibe Series the prestigious ADA seal of approval. It has shown efficacy in removing plaque and helping to prevent and reduce gingivitis. Vibe Series goes beyond just cleaning teeth – it provides complete oral care with unique modes that include one for whitening and polishing teeth and one for improving gum health.

8 DuPont Brush Heads & Travel Case Included - Every Vibe Series toothbrush comes with 8 brush heads engineered by world famous DuPont; a world leader in quality & materials science. Each brush head lasts 3 months so 8 will last for 2 years. Also included is a convenient custom hard shell travel case made of BPA-free plastic with space for two brush heads. Vibe Series can last 4 full weeks (2 min/2x a day) on a full charge so it's perfect for on the go travel with the included travel case.

40,000 VPM Smart Toothbrush – Beauty, brains and power. The Vibe Series is a world class modern electric toothbrush packed with the most up to date technology. It features an ultra-powerful and industry leading motor producing 40,000 vibrations per minute , lithium-ion battery, ultra-fast wireless charging, 4 mode operation, smart vibration timers, 8 DuPont engineered brush heads, and a custom travel case; all with a sleek, ultra-slim, lightweight and IPX7 rated waterproof body.

Accepted by the American Dental Association (ADA) Council on Scientific Affairs – We put our money where your mouth is. Investing in premium oral care technologies has earned the Vibe Series the prestigious ADA seal of approval. It has shown efficacy in removing plaque and helping to prevent and reduce gingivitis. Vibe Series goes beyond just cleaning teeth – it provides complete oral care with unique modes that include one for whitening and polishing teeth and one for improving gum health.

8 DuPont Brush Heads & Travel Case Included - Every Vibe Series toothbrush comes with 8 brush heads engineered by world famous DuPont; a world leader in quality & materials science. Each brush head lasts 4 months so 8 will last for over 2.5 years. Also included is a convenient custom hard shell travel case made of BPA Free plastic with space for two brush heads. AquaSonic can last 4 full weeks (2 min/2x a day) on a full charge so its perfect for on the go travel with the included travel case.

40,000 VPM Smart Toothbrush – Beauty, brains and power. The Black Series is a world class modern electric toothbrush packed with the most up to date technology. It features an ultra-powerful and industry leading motor producing 40,000 vibrations per minute, a lithium-ion battery, ultra-fast wireless charging, 4 mode operation, smart vibration timers, 8 DuPont engineered brush heads, and a custom travel case; all with a sleek ultra-slim, lightweight and IPX7 rated waterproof design.

Accepted by the American Dental Association (ADA) Council on Scientific Affairs – We put our money where your mouth is. Investing in premium oral care technologies has earned the Black Series the prestigious ADA seal of approval. It has shown efficacy in removing plaque and helping to prevent and reduce gingivitis. Black Series goes beyond just cleaning teeth – it provides complete oral care with unique modes that include one for whitening and polishing teeth, and one for improving gum health.

Modern Tech for a Healthy Smile - Black Series brings toothbrushes into modern times with its built-in enhanced features. A lithium-ion battery, ultra-fast wireless charging (forget outdated USB charging), 4 distinct brushing modes and a smart vibrating notification timer are some of the enhanced features built into the sleek and ergonomic waterproof black satin handle.

Complete Oral Care for 2 – AquaSonic Duo provides complete oral care in one simple countertop setup. Duo features 2 modern smart toothbrushes with the latest oral care technologies including 40,000 vibration per minute motors, true wireless charging, 3 unique modes including modes for whitening teeth and gum health, 30-day battery life, in sleek midnight black and optic white brush handles. Duo Series comes with 12 additional accessories including 10 DuPont brush heads and 2 travel cases.

Modern Technology For A Healthier Smile - Each Duo toothbrush bring your oral health routine into modern times with its built in enhanced features. Super fast wireless charging, 3 distinct brushing modes and a smart vibrating notification timer are some of the enhanced features built in to the sleek and ergonomic waterproof black and white satin handles.

Convenient Modern Home & Travel Set-Up – Duo is perfect for couples, kids or anyone in between. A simple dual wireless charging dock takes up a few inches of countertop space while adding a sleek modern element to your bathroom. Duo’s 30 day battery life means it’s also perfect for travel – simply put your duo in its included travel case and take it on the go while leaving the charger at home.

Designed with you in mind, Philips One is a big step up from manual brushing. Battery life up to 30 days

Micro vibrations and tapered bristles made of soft nylon gently polish teeth for a brighter smile

Take your manual brushing experience to the next level by pairing regular brush motions with bristle micro-vibrations

Pro Results – The world’s best smart toothbrush just got better. Black Series Pro includes state-of-the-art technology including features like an industry leading 40,000 vibrations per minute motor, 4 unique modes including modes for whitening teeth and improving gum health, and built-in smart timers to help you brush efficiently. A UV Sanitizing Base & UV Travel Case uses auto-timed UV lights to kill 99.9% of germs after your brushing sessions.

Advanced Technology Approved by the American Dental Association– 4 unique modes including “Clean”, “Soft”, “Whiten” and “Massage” ensure complete oral care and not just clean teeth. Enhanced features like a 40,000 VPM motor, 30 second notification timer, 2-minute auto timer, and IPX7 waterproof rating make Black Series Pro as powerful as it is sleek. Black Series Pro has earned the prestigious ADA seal in showing efficacy in removing plaque and preventing gingivitis.

Kills 99.99% of Germs with UV Sanitization – Hygiene is as important as ever and rinsing brush heads does little to kill left over oral germs. Black Series Pro solves this issue by using an auto-timed UV sanitizing chamber to kill 99.99% of germs and prevent them from multiplying before your next brushing session. The included UV and charging travel case ensures your oral hygiene is up to par while traveling.

Pro Home & Travel System for 2 – World class oral care gets even better with Duo Pro. Duo Pro features 2 IPX7 waterproof toothbrushes in midnight black and optic white, with 40,000VPM motors, lithium-ion batteries (30 days on a single charge), 4 unique modes with smart timers, and true wireless charging. A new UV sanitizing and wireless charging dock with autotimer kills 99.99% of germs. Duo Pro features 10 ProFlex brush heads and 2 custom travel cases for a total of 15 items.

Kills 99.99% of Germs with UV Sanitization – Rinsing brush heads does little to kill leftover oral germs. Duo Pro solves this issue by using an auto-timed UV sanitizing chamber to kill 99.99% of germs and prevent them from multiplying before your next brushing session. The dual brush docking stations also feature true wireless charging; not cheap USB charging of competitors.

Accepted by the American Dental Association (ADA) Council on Scientific Affairs – We put our money where your mouth is. Investing in premium oral care technologies has earned Duo Pro the prestigious ADA seal of approval. It has shown efficacy in removing plaque and helping to prevent and reduce gingivitis. Duo Pro goes beyond just cleaning teeth – it provides complete oral care with unique modes that include one for whitening and polishing teeth and one for improving gum health.

Removes up to 10x more plaque vs. a manual toothbrush

Pressure sensor lets you know when you're brushing too hard

Progress report gives you the guidance you need to improve and maintain healthy brushing habits

Removes up to 10x more plaque vs. a manual toothbrush

Pressure sensor lets you know when you're brushing too hard

Progress report gives you the guidance you need to improve and maintain healthy brushing habits

Removes up to 10x more plaque vs. a manual toothbrush

Pressure sensor lets you know when you're brushing too hard

Progress report gives you the guidance you need to improve and maintain healthy brushing habits

【Pressure Sensor Protect Your Gums】The smart indicator flashes orange when brushing too hard, reminding you to reduce pressure to help keep gums protected. Hyslor sonic toothbrush also comes with 3 DuPont nylon replacement heads and 3 soft sensitive brush heads to meet your various daily needs.

【Powerful Electric Toothbrush for Adults】 Features an industry leading motor producing 42,000 vibrations per minute, Hyslor electronic toothbrush drives fluid deep between your teeth and along the gum line for thorough cleaning, removing up to 10x more plaque and improving oral health in two weeks vs. a manual tooth brush.

【Personalize Your Oral Care Plan】Hyslor electric toothbrush offers high-performance brushing modes, clean, white, clean+, gumcare, sensitive to fulfill different brushing purposes without damaging your teeth. Stylish and simple design also makes this rechargeable toothbrush an ideal gift for your friends and family.

【Sonic Cleaning and Multiple Functions】: Experience the difference of sonic cleaning and 10x more plaque removal than a manual toothbrush. This toothbrush is designed for all types of teeth, even braces. It uses sonic technology to deep clean your teeth and gums, leaving your mouth feeling fresh and healthy.

【3 Frequencies and 3 Modes】: Personalize your brushing experience with 3 strength options (High, Medium, Low) and 3 modes (Gentle, Clean, White). The toothbrush has a 3-second buffer time before starting, so you can easily switch to the mode you prefer.

【5H Quick Charge for 90 Days Use】: Charge your toothbrush in just 5 hours using any USB port (charger not included) and enjoy up to 90 days of use (2 times per day). The toothbrush has a high-capacity battery and fast-charging technology for your convenience.

【Sonic Cleaning and Multiple Functions】: Enjoy exceptional cleaning and 10x more plaque removal than a manual toothbrush. This toothbrush is suitable for all kinds of teeth, including braces. It uses sonic technology to deep clean your teeth and gums, leaving your mouth fresh and healthy.

【3 Frequencies and 5 Modes】: Customize your brushing experience with 3 strength options (High, Medium, Low) and 5 modes (Gentle, Clean, White, Polishing, Novice). The toothbrush has a 3-second buffer time before starting, so you can easily adjust to the mode you want.

【5H Quick Charge for 90 Days Use】: Charge your toothbrush in just 5 hours using any USB port (charger not included) and enjoy up to 90 days of use (2 times per day). The toothbrush has a high-capacity battery and fast-charging technology for your convenience.

HIGH FREQUENCY VIBRATION WITH PRESSURE SENSOR: This Wagner electric toothbrush comes with a high frequency vibration 48,000 VPM levitating motor to ensure a deep, thorough, and effective tooth brushing experience. Toothbrush has 5 cleaning modes and 4 levels of intensity. This combination allows you to choose from any one of 20 cleaning options. In addition, it has a built-in PRESSURE SENSOR to protect your teeth and gums from damage. ✅ Other colors of WAGNER toothbrush available on AMAZON✅

MADE TO COMFORTABLY CLEAN: We include 8 DuPont brush heads. In order to keep teeth and gums protected and soothed. SMART timer has been built into the toothbrush. Professional dental recommendations of 2 minutes brushing time with 30 seconds interval reminders are included to ensure the proper gum health We recommend changing the brush head every 3 month.

ULTRA WHITENING, IMPROVES GUM HEALTH: As a 100% Dentist-approved vibrating electric toothbrush, the Wagner toothbrush removes up to 10 times more plaque than manual toothbrushes. As a result, it improves gum health in less than 2-weeks, and begins to whiten teeth in less than 1-week.

【Provides Diamond Cleaning】Bitvae Smart S3 Rechargeable sonic toothbrush features an industry-leading ultrasonic motor that generates 40,000RPM. It provides superior cleaning even in hard-to-reach areas of your mouth. If you are looking for a professional cleaning toothbrush, this is the one!

【Unique Bristle Design to Prevent Tooth Decay】The unique bristle design of the sonic cleaning brush sets it apart from others. Users can get a more thorough dental cleaning experience than with a standard toothbrush. Effectively reduces tartar buildup and helps prevent tooth decay or cavities.

【Personalize Your Brushing】Here are 5 modes & 3 intensities on our sonic toothbrush (9 adjustable intensities on the app) for various gum care needs. This IPX7 waterproof toothbrush has a built-in 2mins timer that pulses every 30secs to remind you to switch to the next quadrant of the mouth.

Electric Toothbrush for Adults, Dnsly Electric Toothbrush with 2 Brush Heads, Smart Timer, Travel Case, 3 Modes Rechargeable Electric Toothbrush, USB Charge Last 30 Days Use, Sonic Toothbrush, Black

Cleaning with sonic technology electric toothbrush- The rechargeable sonic toothbrush can move at 36,000 times per minute which causes a lot of disruption of plaque. This whitening toothbrush outperformed manual ones in reducing plaque and gingivitis.

One 2 hours charge lasting 30 days- This Dnsly electric toothbrush has a powerful battery life and is supported by global USB charging. Its perfect to a long trips abroad, you are going to get at least 30 days out of the toothbrush without the need to charge. The included BPA free hard shell travel case will keep your toothbrush hygienic and clean.

HIGH FREQUENCY VIBRATION WITH PRESSURE SENSOR: This Wagner electric toothbrush comes with a high frequency vibration 48,000 VPM levitating motor to ensure a deep, thorough, and effective tooth brushing experience. Toothbrush has 5 cleaning modes and 4 levels of intensity. This combination allows you to choose from any one of 20 cleaning options. In addition, it has a built-in PRESSURE SENSOR to protect your teeth and gums from damage.

MADE TO COMFORTABLY CLEAN: We include 8 DuPont brush heads. In order to keep teeth and gums protected and soothed. SMART timer has been built into the toothbrush. Professional dental recommendations of 2 minutes brushing time with 30 seconds interval reminders are included to ensure the proper gum health We recommend changing the brush head every 3 month.

ULTRA WHITENING, IMPROVES GUM HEALTH: As a 100% Dentist-approved vibrating electric toothbrush, the Wagner toothbrush removes up to 10 times more plaque than manual toothbrushes. As a result, it improves gum health in less than 2-weeks, and begins to whiten teeth in less than 1-week.

Powerful Electric Toothbrush Cleaning As Dentist - up to 40,000 VPM high vibration sonic toothbrush, removes up to 100% plaques and stains, giving a truly deep clean along the gum and line and between teeth, than a regular manual toothbrush. Improves teeth and gums health in just 2 weeks with our Ultra Sonic Toothbrush. Electric toothbrush with 8 smart timer, 8 brush heads, 5 optional modes, 30-days battery life.

A 2 Minutes Smart Timer & Brushing Reminder - Sonic Electric Toothbrush built in 2 minutes smart timer encourages you to achieve the dentist-recommended brushing habit, and interval pause every 30 seconds reminds you of replacing brushing area for an effective clean. IPX7 Waterproof electric toothbrush.

8 Dupont Heads Last For 2 Years - Dnsly Electric toothbrushes for adults comes with 8 toothbrush heads made of dupont nylon, to suit teeth topography for thorough cleaning of gums and hard to reach areas, with 8 brush heads that lasts 3 months each they will last you for over 24 months. A toothbrush heads hygienic protective cover included, to offer well-rounded protection on your brush heads hygienic and dust-free.

American Dental Association Accepted: The Council on Scientific Affairs of American Dental Association has awarded the ADA Seal of Acceptance to Bitvae Smart S2 Electric Toothbrush based on its finding that it is safe and has shown efficacy in removing plaque and helping to prevent and reduce cavities and gingivitis.

More Effective Cleaning: Featuring an industry-leading Ultra sonic motor that generates 40,000 micro brush movements per minute, ultrasonic toothbrush removes more plaque than a manual toothbrush which will help you achieve healthier gums and whiter teeth.

100 Days of Battery Life: The battery technology benefits including fully charges in just 4 hours, up to 100 days of use. Bitvae S2 Rechargeable Toothbrush extensively outperforms other toothbrushes in operating time, frees your battery worries.

【Powerful Sonic Cleaning】Bitvae electric toothbrush with 42000 magnetic levitation motor can removes debris. Remove up more plaque than a manual toothbrush and stronger than a regular eccentric motor toothbrush electric. Giving your teeth and gums a deep cleaning, and preventing gingivitis.

【Customize Your Toothbrush by APP】Electric toothbrushes built in 5 cleaning modes: White, Clean, Soft, Gum Care and Smart. In Smart mode, you can set preferable mode or cleaning plan by connect the toothbrush with the application. The memory function will turn on the cleaning mode set at last shutdown.

【8 Different Replacement Brush Heads】6pcs "W" shape design bristles are easy to reach deep between teeth for thorough cleaning. 2pcs sensitive care brush heads with silicone tongue cleaning back, take care of your gums and teeth. Sonic electric toothbrush with 8 brush heads will last for about 24 months.

Intelligent Display Electric Toothbrush Set – Color touchscreen to unlock smart & interactive oral care experience. The Oclean X Pro Elite electric toothbrush is functional and simple to use, with the newest brushing result in an instant display. It makes it easy for you to track brushing performance and hard-to-reach target areas. Total oral care solution by Oclean care APP. Oclean sonic toothbrush encourages you and your family to get out of incorrect brushing habits.

In-app Tailor Oral Care for All – This X Pro Elite Ultrasonic toothbrush comes with 4 modes (Clean, Sensitive, Massage, White)and 32 different brushing intensities. Adults can choose standard or personalization cleaning modes/brushing times as they like. More protection from unwanted damage to the teeth and gums is available from the pressure sensor, 8-quadrant minder, and Muti-Minutes Smart Timer built-in. Oclean electric toothbrushes are helping all toward ideal oral care！

Ultra-quiet Sonic Toothbrush under 45dB – With Oclean WhisperClean technology, this ultra-sonic toothbrush quiets at less than 45dB, averaging 20~25 dB quieter than most electric toothbrushes. Maintaining a sonic cleaning w the 84,000 brush strokes per min ultrasonic maglev motor, removes up to 8x more plaque but won’t hurt your gums. Just enjoy the quiet brushing, and let the premium DuPont brush heads help give a thorough clean!

【Advanced Ultrasonic Technology】:982 ultrasonic toothbrush "with twin-engine" magnetic levitation motor brings 42,000 VPM. You can remove up to 10x more plaque vs. a manual toothbrush and achieve up to 7x healthier gums in just 2 weeks.

【3 Modes, 3 Intensities for a Personalized Experience】:With 3 modes: Clean, White and Gum Care to take care of your personal brushing needs. The 3 intensity levels allows you to choose between higher setting to boost your clean and lower for more sensitive mouths.

【8 Premium Brush Heads for an Expert Clean Feeling with Replacement Reminder Function】:3D bristle cutting achieves a thorough cleaning not only on teeth surface but also at hard-to-reach area. Smart brush head replacement reminders to ensure your brush heads always clean and hygienic. 8 brush heads can last for 2 years, no need to buy replacement heads frequently and save money for you.

★Teeth Whitening Aids：With sonic vibrations of up to 24,000 beats per minute（it will produce some noise, but the sound is not too loud, because each person's tolerance for noise is different, so some people will find the sound too loud）,It has shown efficacy in removing plaque and helping to prevent and reduce gingivitis. it goes beyond just cleaning teeth – it provides complete oral care with unique modes that include one for whitening and one for improving gum health.

★Material:u-shaped electric toothbrush head made of edible grade silicone with 99.9% tooth wrap rate.The silicone is soft (so don't let your child bite it, it can easily damage the toothbrush head) and can be a good way to prevent your child's gums from being harmed.

★This toothbrush has four brushing modes, each lasting 45 seconds. It is recommended to cycle through each of these four brushing modes once each time you brush your teeth.

40,000 VPM Sonic Toothbrush – for a Great Deep Cleaning. The Deepklean Electric Toothbrush is a world class modern toothbrush packed with the most up to date technology. It features an ultra-powerful and industry leading motor producing 40,000 vibrations per minute , Long-Last battery, USB ultra-fast charging, 6 mode operation, smart vibration timers, 8 DuPont engineered brush heads and bristles, and a custom travel case; all with a sleek ultra-slim, lightweight and IPX7 rated waterproof design.

8 DuPont Brush Heads & Travel Case Included - Every Deepklean toothbrush comes with 8 brush heads engineered by world famous DuPont; 4 for Deep Cleaning and the other 4 for gums care. Also come with 8 bristles protect cover. A world leader in quality & materials science. Each brush head lasts 4 months so 8 will last for over 2.5 years. Also included is a convenient custom hard shell travel case made of BPA Free plastic with space for two brush heads.

6 Personalized Modes - TO Suit Different Oral Conditions. Built in Clean, Clean+, White, White+, Soft, Soft+, enhanced features, Sensing fluid to access hard-to-reach areas between the teeth and gum-line, Clean Your Teeth just like the dentist does. removing more stains in just 7 days, improve your oral health in just 14 days. One botton use, Simple operation, suitable for adults and kids.

MODERN ULTRASONIC TECHNOLOGY: GuruNanda's Sonic Toothbrush uses modern ultrasonic technology with 33,000 micro-vibrations per minute for effective cleaning and gentle polishing. The high frequency vibrations help reduce plaque and aid in prevention of tooth decay, while noise cancellation technology reduces the sound to under 60 dB. With a focus on white teeth and healthy gums, the toothbrush is gentle on enamel and provides a safe, effective cleaning experience.

PORTABLE & RECHARGEABLE SONIC TOOTHBRUSH: This electric power toothbrush is compact and comes with a travel case for easy portability. It comes with a 2000mAH battery. With a long-lasting battery that lasts up to 360 minutes on a single charge, it can be recharged in just 2 hours using the included charger stand. The toothbrush is perfect for home or travel use, providing effective cleaning and a convenient charging solution.

5 UNIQUE BRUSHING MODES:It features 5 unique brushing modes, including Clean, White, Polish, Sensitive, and Gum Care, for a customized brushing experience. The soft bristles easily reach between teeth and are suitable for use on braces. Clean mode effectively helps in removing plaque, White mode removes surface stains for brighter teeth, and Polish mode provides a combination of both cleaning and whitening. Sensitive and Gum Care modes help in gentle cleaning for sensitive teeth and gums.

★Teeth Whitening Aids：With sonic vibrations of up to 24,000 beats per minute（it will produce some noise, but the sound is not too loud, because each person's tolerance for noise is different, so some people will find the sound too loud）,It has shown efficacy in removing plaque and helping to prevent and reduce gingivitis. it goes beyond just cleaning teeth – it provides complete oral care with unique modes that include one for whitening and one for improving gum health.

★Material:u-shaped electric toothbrush head made of edible grade silicone with 99.9% tooth wrap rate.The silicone is soft (so don't let your child bite it, it can easily damage the toothbrush head) and can be a good way to prevent your child's gums from being harmed.

★This toothbrush has four brushing modes, each lasting 45 seconds. It is recommended to cycle through each of these four brushing modes once each time you brush your teeth.

【Powerful Sonic Cleaning】Bitvae electric toothbrush with 42000 magnetic levitation motor can removes debris. Remove up more plaque than a manual toothbrush and stronger than a regular eccentric motor toothbrush electric. Giving your teeth and gums a deep cleaning, and preventing gingivitis.

【Customize Your Toothbrush by APP】Electric toothbrushes built in 5 cleaning modes: White, Clean, Soft, Gum Care and Smart. In Smart mode, you can set preferable mode or cleaning plan by connect the toothbrush with the application. The memory function will turn on the cleaning mode set at last shutdown.

【8 Different Replacement Brush Heads】6pcs "W" shape design bristles are easy to reach deep between teeth for thorough cleaning. 2pcs sensitive care brush heads with silicone tongue cleaning back, take care of your gums and teeth. Sonic electric toothbrush with 8 brush heads will last for about 24 months.

MODERN ULTRASONIC TECHNOLOGY: GuruNanda's Sonic Toothbrush uses modern ultrasonic technology with 33,000 micro-vibrations per minute for effective cleaning and gentle polishing. The high frequency vibrations help reduce plaque and aid in prevention of tooth decay, while noise cancellation technology reduces the sound to under 60 dB. With a focus on white teeth and healthy gums, the toothbrush is gentle on enamel and provides a safe, effective cleaning experience.

5 UNIQUE BRUSHING MODES:It features 5 unique brushing modes, including Clean, White, Polish, Sensitive, and Gum Care, for a customized brushing experience. The soft bristles easily reach between teeth and are suitable for use on braces. Clean mode effectively helps in removing plaque, White mode removes surface stains for brighter teeth, and Polish mode provides a combination of both cleaning and whitening. Sensitive and Gum Care modes help in gentle cleaning for sensitive teeth and gums.

NATURAL BLEND OF ESSENTIAL OILS: Our GruruNanda concentrated mouthwash is a unique blend of Vitamins and essential oils to support effective oral care. Pure Essential Oils like Clove oil support healthy gums. Cardamom oil and Fennel oil provide a natural refreshing feeling, while Peppermint Essential Oil leaves a long-lasting fresh clean taste in your mouth.