How to use:
1.clean the teeth surface
2.rotate the end of the whitening pen in the clockwise direction
3.stop rotating if the gel could be seen on the top of the whitening pen
4.Apply the gel on the surface of the teeth to be whitened
5.gargle the mouth with fresh water 30 minutes later.
Notice
1.the gel shall be used before teeth brushing
2.at the first application, the air on the front of the whitening pen shall be pushed out by rotating the end of the pen for several rounds.
3.the gel shall be used on the teeth for once or twice a day with a duration of 30 minutes
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