Yes, you use it twice a day and it goes in your mouth... and even the cleanest of mouths are loaded in germs and bacteria. However, as long as you’re properly storing your toothbrush, that quick rinse at the end of your brushing is just fine. Here are the general recommendations for Toothbrush Care from the ADA (American Dental Association) and the Council on Scientific Affairs: Do not share toothbrushes. Sharing a toothbrush could result in an exchange of body fluids and/or