What is the most natural way to keep your teeth white? Some of the obvious is to keep away from too much coffee, tea, or anything that can cause tooth stains. Brushing your teeth after every meal is the one thing that people almost always take for granted. Periodically use mix baking soda with your regular toothpaste to make your teeth white. When this fails, then it might just be the time for you to check with a Plano Dentist.