Keeping your toothbrush clean is a start for good oral hygiene.
To keep your toothbrush clean, it’s best to keep it stored in an upright position. Storing it upright allows the toothbrush to dry between uses and prevent any pesky germs from festering. If you catch a cold or get sick and worry about those germs on your toothbrush, you can also soak it in alcohol, mouthwash, or a 1:1 water/hydrogen peroxide solution. As long as you allow your toothbrush to dry between uses, the germs cannot survive. The American Dental Association recommends that you change your toothbrush once every three months because of wear—after your dentist visit every six months and then once between each of those visits.