How to Disinfect a Toothbrush in Peroxide

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Things You'll Need

  • Cup

  • Hydrogen peroxide

Proper oral care will keep your teeth looking their best.

Bacteria can lurk on your toothbrush waiting for the moment when they can come in contact with your mouth. Normal soap and water does not kill the bacteria or germs covering the toothbrush. Fortunately, you can disinfect the toothbrush safely with hydrogen peroxide. Hydrogen peroxide has natural oxidizing properties that will aid in sanitizing hard surfaces and objects, including toothbrushes. Furthermore, hydrogen peroxide is inexpensive and available in the health and beauty section of grocery stores.


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Step 1

Fill a small cup with enough 3-percent hydrogen peroxide to cover the toothbrush bristles.

Step 2

Place the toothbrush with the bristles down inside the cup, and store when not in use. Alternatively, rinse the toothbrush with 3-percent hydrogen peroxide before each use.

Step 3

Discard the hydrogen peroxide once a day, and refill the cup with fresh peroxide.

Step 4

Repeat the process every day or after you brush your teeth during times of illness.


Hydrogen peroxide can cause health complications if large amounts are swallowed. Keep the peroxide out of children’s reach. Replace your toothbrush every three months or after having a cold, flu or other illness. Refrain from sharing your toothbrush with others, and do not store the toothbrush where it can touch other toothbrushes' bristles.