1. Step 1: Take out the tooth whitening pen and directly wipe the tooth surface to decolorize the teeth one by one until the tooth stains are cleaned.
2. Step 2: Repeated wiping test for stubborn tooth stains, the more polished the teeth, the brighter and whiter they will be.
3. The tooth whitening pen cannot be used for a long time. Tooth whitening pen is mainly suitable for tooth whitening. It contains phytic acid, glycerin, sodium citrate, mint, clove and other ingredients. It is simple, convenient and easy to carry, but it is easy to cause dependence. Long term use of tooth whitening pen will cause great harm to teeth.