Title: Go to a dentist instead
Product review: Did this stuff for 3 weeks, every day for 20 minutes, on my top row of teeth so I could compare to the bottom. Had only 4 cups of coffe during this period, and nothing else staining such as red wine or tobacco. Can't see any difference at all. Think I did everything right. If I want to whiten, no more of these strips or gels or whatever, it's to the dentist I go.
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