1. Can I use my toothbrush in the shower?

Your Kyoui Toothbrush was designed to be 100% waterproof, you can brush your teeth under the shower with serenity or clean your toothbrush handle.  It will not damage your device.


2. When to charge my toothbrush?

When you receive your Kyoui Sonic Toothbrush, you will need to charge it for 24h before using it for the first time. Once it is fully charged, you can charge when it runs out of battery (red light blinks).


3. My toothbrush is not working. What can I do?

If your toothbrush is not working, charge it for 24h. If it is still not working after 24h of charge. Please contact our warranty claim team so they could assist you with your non working device.


4. My toothbrush blinks in red. What does it mean?

When your toothbrush is showing a red indicator light, it means that your toothbrush is running low on battery and we recommend you to charge it.


5. How long does the toothbrush battery last?

Your toothbrush battery can last for up to 30 days. You can travel without having to carry your charger around.


6. I am travelling soon, is my toothbrush allowed in my carry on?

Yes, the battery of your Kyoui Toothbrush is Ni-MH so it is allowed in your carry on.


7. How often do I need to change my brush heads?

We recommend changing your brush heads every 3 months and subscribing to your brush heads replacement, so you will not forget to change it.


8. I do not know how to change my brush heads.

Putting heads on: align brush head's groove to the handle shaft, push and twist. Taking brush heads off: twist brush head and then pull it from handle.



Twist and Pull.
When the brush heads are new, they can be a little light. Please be gentle.




9. What are the differences between the 3 brush heads?

Kyoui Oral Care designed 3 different brush heads to make sure that your oral hygiene is at its best.
We also created different colors to help you making the difference.


Pick brush head white



Pick head  -  Plaque and Tartar remover
Use the Pick head as often as you like on soft mode to clean your gum line, between teeth and the back of your teeth.



Cleaning Angled Brush Head White



Cleaning head - White Head
The cleaning head has stronger bristles. It is wavy to contour the teeth. Use the cleaning head in the morning time or twice a day to clean your teeth and tongue.



Perio brush head black (gums brush)


Perio head - Black head
The perio head is softer. It is perfect if you have sensitive gums. Use the perio head at night time to polish your teeth and massage your gums.




    10. Why is my toothbrush curved?

    Kyoui Oral care own a patent for designing a 45°angle on your toothbrush. The angle enables a better brushing experience and makes it easier to follow the dentists’ recommended brushing motion (circles or up-and-down). With the angle you can reach all areas of your mouth that the straight toothbrush cannot, especially the back of the mouth.


    11. What are the different settings?

    Your Kyoui Sonic Toothbrush has 3 different modes.

    • Normal mode  - For the ones who are used to electronic toothbrushes. 31000 sonic pulse/min.

    • Soft mode - For the ones who are new with the use of electronic toothbrushes and the ones who have sensitive gums or teeth. For the use of the Pick Head. 28000 sonic pulse/min.

    • Pulse mode - To give your gums a massage.


    12. I just received my toothbrush and I am not sure how to use it.

    Watch the two videos below to help you use your toothbrush.

    How to hold your toothbrush

    How to use your toothbrush with the different heads. 

    Please refer to number 9 to know the differences between the heads and number 11 to know the differences between the modes.


    13. Why is my toothbrush stopping and restarting again?

    Your toothbrush is stopping for a micro-second in your brushing routine because we divided the mouth in 4 zones (Top right/ top left/ bottom right/ bottom left).
    Each zone represents 30 seconds for a total of 2 mins. Your toothbrush will automatically stop after 2 mins, it is the recommended brushing time by dental professionals. If you desire to brush your teeth for a longer time you could turn it on again.


    14. Can I use my toothbrush with my braces?

    Yes! Our bristles are soft and safe for your braces. You can use the Pick Head to help you remove food and plaque between your brackets.


    15. Can Kyoui help me clean under my implants and bridges?

     Yes! You can use the Pick Brush Head on your Kyoui Sonic 3000 Electric Toothbrush System to clean under implants, bridges and retainers. With the sonic vibration and the precise bristles on the Pick Brush Head, you'll be able to effortlessly remove debris under bridges, implants and retainers.

    16. What is the warranty on the Kyoui Sonic 3000 Electric Toothbrush System?

    Yes, the Kyoui Sonic 3000 Electric Toothbrush System comes with a 2-year warranty. When you receive your toothbrush, you will need to register your new device. Please be aware that the warranty is valid only if you replace your brush heads at least every 6 months.


    17. What does EMF-free mean?

    EMF stands for Electronic and Magnetic Fields.

    EMFs have a negative effect on our health and that is why we are proud to say that our toothbrushes are EMF-Free.


    18. How do I contact support?

    You can email us at info@kyoui.com or call us at 855 465 9684.