Hopefully you already know that you should brush your teeth at least twice per day. But did you know that, in addition to brushing your teeth, you should also be flossing twice daily too? Lucky for you, WH talked to expert dentists about how to floss properly. And spoiler: You're probably doing it wrong. “Brushing your teeth only cleans three of the five exposed tooth surfaces,” explains Bill Dorfman, DDS, a cosmetic dentist based in Los Angeles. “A toothbrush cannot clean in between your teeth, so if you don't floss, you are leaving dangerous bacteria in your mouth.” In addition t...