Quote:
Originally Posted by ChuckF
Your teeth may have gotten a couple of shades lighter without you noticing. It's one of those incremental changes that isn't always obvious. Heavy stains or discoloration can take several treatments over a period of months. Are you using the trays as often as instructed?
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Great.
I don't remember them specifying a specific regime, just use it for at least a couple of hours whenever I do.