And, if you must imbibe, try to drink dark liquids through a straw, says Dr. Jeffrey Rappaport. The banana peel method isn’t proven yet, but if you’re looking for a cheap, easy, and silly way to whiten your teeth then give it a try. Then the dentist will apply a teeth whitening gel and place the zoom light on it for about 15 minutes. While professional teeth whitening treatment will admittedly give you the best,…