Toothbrushes
You leave them to dry in a damp bathroom, probably across from the toilet, where the bristles become contaminated with the airborne bacteria released with every flush. Bugs such as E. coli, Listeria, and Strep — not to mention mold — may be lurking between the bristles. That’s nothing to smile about.
Solution: The ADA suggests you rinse toothbrushes thoroughly after use, allow them to dry completely, and replace every three to four months or after a sickness.