I've heard everything from 5 minutes to 20 minutes. Anyone out there know for sure? I know the 22% gel can even be left on overnight. Can't seem to find any specifics on the 35% gel though. You dental techs out there -- help!
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take it 10 min at a time.. sometimes those gels make your teeth sensitive and uncomfortable. try 10 min the first time and the increase by 2 min or so everytime there after.. you will know what your teeth can handle... it is better to do whiten them slowly.. they didn't get stained overnight..
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