- Directions: First cut off about 18 inches of floss. Wind some around the index finger of each hand until you have about 2 inches to work with. Gently work the floss between the teeth (don't snap it in) and move it back and forth down to the gum line to loosen plaque. Then let about and inch uncoil from your left hand and take up the slack with your right hand so that you have a fresh piece of floss between your teeth. Gently pull the floss out from between your teeth.Note: Slight gum bleeding during flossing is frequently a sign of unhealthy gums. By flossing daily, bleeding should stop. Consult your dentist if bleeding persists.