Q&A: How often is it safe to use teeth-whitening strips?
Question by Sunny: How often is it safe to use teeth-whitening strips?
I used Crest WhiteStrips about 7 months ago, and now I want my teeth whiter again so I want to use them again. Is 7 months in between enough time to use them again? How often is it safe to use teeth-whitening strips?
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