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It come in little plastic packets and uses mouth trays. It says use 1 hour but Ive done it for a few hours at a time before. I want to get as much use out of 5 single-use packets as possible because this stuff is really expensive amd I'm broke. this time i completely dried my teeth before applying it and after i put the mouthtrays in stuffed my mouth with tissue paper I keep changing so no spit at all gets in the trays. Its called White Brilliance and uses 16% Carbamide Peroxide. How long can I safely leave the trays in and what will happen if I overdo it?
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