Teeth Whitening Instructions Following Teeth Whitening For the first 48 Hours Following Whitening: Teeth are more susceptible to staining for 48 hours after bleaching treatments. For the 48 hours after whitening, it is best to avoid dark-colored food or beverages that can stain your teeth. Any item that can stain your clothes, can also stain your teeth.Avoid: berries, cola or other dark sodas, red wine, coffee and tea, tobacco and ketchup, soy or other dark sauces.Using Your Custom Trays: Follow the instructions given by our office, placing the bleaching gel in the center of each tooth position on the tray so that the gel will rest against the anterior surface of the teeth once it is placed in your mouth. Wear trays for the recommended time. Rinse the mouth and gently remove any gel remaining on your teeth with a soft bristle toothbrush. Clean the trays. Good dental health starts at home. Download Your Oral Health Care Guide Email Address Download We respect your privacy.