We know we should floss at least once a day, but not everyone knows the right way to do it. Use this step-by-step guide to find out how to properly floss your teeth: Break off about 18 inches of floss and wind most of it around one of your middle fingers. Wind the remaining floss around the same finger of the opposite hand. This finger will take up the floss as it becomes dirty. Hold the floss tightly between your thumbs and forefingers. Guide the floss between your teeth using a gentle rubbing motion. Never snap the floss into the gums. When the floss reaches the gum line, curve it into a C shape against one tooth. Gently slide it into the space between the gum and the tooth. Hold the floss tightly …