Question

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alex_227: 2 months ago via iPhone

How long do you leave the crest white strips on

it says on the box 2 hours but some people leave it on for less.

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Answer 1

arabbit: 2 months ago

follow the box its probably better then others is opinions

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Answer 2

Dradebaugh: 2 months ago via Android

it's stated on the side of the box

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Answer 3

puppylover13: 2 months ago via Android

you should only leave them on for 20-30 minutes longer than that can make your teeth really sensitive

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