Floss Nightly After BrushingFlossing after every meal will help keep your teeth and braces clean, which will also help keep your treatment time on track. To floss with braces, use a floss threader or special orthodontic floss to thread the floss behind each wire. Wrap the ends of the floss around your pointer fingers of both hands, leaving a few inches of taught floss between them. Gently slide the floss between each set of teeth using a back and forth motion.