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According to microbiologist Dr. Phillip Tierno, if you leave your toothbrush sitting out on the bathroom counter, it could collect bacteria from toilet flushes, which can travel up to 20-feet in most bathrooms.

That’s why Dr. Tierno recommends regularly running your toothbrush through the dishwasher! According to the American Journal of Dentistry, this method destroys nearly all disease-causing bacteria. Another option? Soak your brush in a mouthwash that contains cetylpyridinium chloride. You’ll find that in products like Crest Pro-Health. Then let it dry completely.