Question:

How long do you leave crest white strips in?

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i lost the box and i w ant to whiten my teeth, so if anyone knows how long i am supposed to leave them in for that would be great!

thanks!

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  1. i leave them in for about 30 minutes

    answer mine?

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  2. I think it's like 10 or 15 minutes.

  3. when i had mine it was 30.
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