Grab some short-length floss. Hold the line between your thumb and forefinger, keeping it short enough to go between your teeth Slide it between your teeth gently and slowly. Take it slow or you could hurt your gums Make a C-shape with floss around each tooth and carefully insert it into the tooth. Gently slide the floss up and down the sides of each tooth to effectively remove plaque and food particles. Repeat this process for all spaces between your teeth, using new floss each time.