i can put on some crest white strips, take them off 30 min later,and my teeth are amazing. and its not like they were very discolored before, so is that why it works so well with just one application? i ususally only use somebefore a big even like a wedding or something like that.
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I am the same way, I think it's because our enamel is thin. Be careful not to overuse.
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