While both KöR and Zoom! teeth whitening solutions are supposed to be permanent, maintaining good habits will ensure your teeth stay as bright as possible for years to come. Here’s what you can do to keep your pearly whites white after a tooth-whitening treatment: Make sure to brush your teeth at least two times daily. Floss at least once daily to remove plaque buildup Limit staining foods, like soda, coffee, wine, chocolate, and tea Use a whitening toothpaste Don’t uses tobacco products Wear your custom whitening trays as recommended by your dentist Visit your dentist at least once a year for checkups and maintenance