The results show that you really have to be dedicated in order for Crest Whitestrips to work. A Five On Your Side tester tried out the new product.
Directions recommend treating the upper teeth first.
You have to wear one strip for about 30 minutes, twice a day for two weeks. Each strip contains a peroxide whitening solution. You are instructed to repeat the process on the bottom teeth for the next two weeks. It's a much weaker solution, and it's going to take a lot longer to whiten teeth. Dentists use a tray fit to your mouth when whitening your teeth.