1. Tear off Crest whitening toothpaste from the hard plastic film.

2. The gel side is attached to the tooth surface.

3. Gently press the adjustment plaster with your fingers to make it completely fit the tooth surface.

4. After 30 minutes of use, remove the plaster from the teeth and discard it.

Extended data:

Open the inner package and divide the upper and lower teeth into two pieces, like transparent glue. Stick the gummed side to the teeth, not the gums. The excess part is attached to the inside of the tooth. Stick to the time requirement for 30 minutes-1 hour. Those who can persist will persist for an hour, and there will be saliva when they persist. It's better not to close the meeting with your mouth slightly open. You can choose a movie to watch, or do something that you can indulge in without being too uncomfortable. Start with a box of 20 stickers. Once it's white, just use it once a month. This can always keep white.