But they might cause irritation and may not operate at the same time. Some OTC kits come with a bendable mouthpiece. These work much better than a single-dimension-fits-all trays. The bleaching gels that are available these kits aren’t as strong as those you will get from a pro. In case https://teethwhiteningsouthafrica86420.wikiusnews.com/659734/indicators_on_teeth_whitening_sa_you_should_know