Why do the instructions for Crest Whitestrips Premium tell you not to brush your!
Question:
Why do the instructions for Crest Whitestrips Premium tell you not to brush your teeth before applying?
The instructions that come with Crest Whitestrips Premium state that "It is best if you do not brush your teeth immediately before applying strips". Why exactly is this?
Answers:
A lot of toothpastes leave a film over your teeth after brushing. This would be just one more obstacle for the whitening solution to overcome.