If you cannot afford to go for teeth whitening services, you can easily do it from home. There are DIY kits for teeth whitening. The most common home remedy for dealing with discoloured or stained teeth is whitening strips. The following are some facts on whitening strips. How Do Whitening Strips Work They contain peroxide, a bleaching component. This chemical whitens your teeth in the same manner bleach whitens clothes. It bleaches your teeth and restores the white colour of your teeth.