Do expired crest whitening strips still work?
I don’t want to waste it.
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It’ll still work, the strength might be weaker though.
it turns your teeth eggshell, rather than white.
lol thanks time to try it
I’ve always wondered this myself, please let us know how it works out!
I don’t know, but I’m scared to try any teeth whitening product. My science teacher told me that it eats the enamel of your tooth. O.o
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