These work, yes. Here is my experience. Crest says to use one pack for 30 minutes, twice a day, or wear two one after the other. I'm cheap so I just leave one set on for an hour.
The top strip is fine but the bottom strip is too wide, I find. They could adhere better. I use a fingernail to kind of fold the strips between the teeth as well for better coverage.
The first …Read more
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