do the crest whitestrips advanced seal actually work? the commercial looks pretty persuading but i want to know if anyone actually tried it and i want some feedback. if it doesnt work what does because i already tried the crest whitestrips original 7 days and those didnt work and i tried 5 minute whitening. thanks!
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They work but the results don't last long, you have to keep using them once you start or your teeth will go back to the way they were.
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