Dentistry. How to floss your teeth properly.
How to Floss
Break off around 18 inches of floss and wrap it around your middle finger three times; the floss will be picked up by this finger when it becomes soiled. Reduce the distance between the two fingers to 6 inches and wrap floss around the opposite middle finger (1 turn). Tighten your grip on the floss using your thumbs and index fingers. Using a gently rubbing motion, guide the floss between your teeth. Curl the floss into a C-shape against one tooth when it reaches the gum line. Slide it into the gap between the gum and the tooth with care. While softly rubbing the side of the tooth with an up and down motion, keep the floss firmly against the toot. Reverse the C-shape to wipe the neighboring tooth surface as well before recovering it.
Wind the dirty floss once around the first middle finger and transfer additional new floss to the next teeth as you complete cleaning each tooth.