There was study conducted at Quinnipiac University in Connecticut and the study found that the worst place for a persons toothbrush is a communal bathroom, more specifically a college dormitory bathroom. Researches surveyed students who shared a bathroom with nine at least nine people and they discovered 54.85 percent of toothbrushes contained fecal bacteria. Also chances are the poop that is on the toothbrush probably doesn't even belong to the owner. The study goes on to say that toothbrushes that are regularly rinsed with cold or hot water were no less likely to contain fecal bacteria. For more on this study click here!

 

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