However They could potentially cause irritation and should not perform at the same time. Some OTC kits come with a bendable mouthpiece. These get the job done better than a single-dimensions-suits-all trays. The bleaching gels that come in these kits aren’t as potent as those you receive from the Professional. https://social-lyft.com/story6842420/indicators-on-teeth-whitening-south-africa-you-should-know