How long do you leave Poladay 9.5 on for?

[martinahandy]

This is where true teeth whiteners come in. Basically, the whiteners use bleaching chemicals to get down into the tooth enamel and set off a chemical reaction (specifically, an oxidation reaction) that breaks apart the staining compounds. Most tooth whiteners use one of two chemical agents: carbamide peroxide or hydrogen peroxide (the same stuff that will bleach your hair). When used in the mouth, carbamide peroxide breaks down into hydrogen peroxide and urea, with hydrogen peroxide being the active whitening ingredient.

http://www.youtube.com/watch?v=Awxg3Y3-9Pw