Cons ur mouth will have loads of salivia so don't do this around anyone. Becareful not to make water too hot before dipping your mouth trays in. IT WILL MELT BEFORE YOUR EYES. U need more than one box application. Pros My teeth weren't yellow just a lil off white. But this stuff does work but not as effective if your teeth is really yellow. You probably would need several boxes.
Teeth Whiting Takes Time More the Yellow More the Work
Cons ur mouth will have loads of salivia so...
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