Visit your dentist: You should address this with the dentist that provided the whitening material and trays, to find the exact casue.
Answered 10/9/2015
2.2k views
FDA approved: If you are looking for an affordable, reliable professional home whitening kit, look no further, because Kör Night home kit is recommended by most cosmetic dentists.
Answered 10/18/2015
2.1k views
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