Review on 🦷 Advanced HP Professional Strength Teeth Whitening Strips - Double Elastic Gel, Custom Bleaching System, 14-Day Supply + Bonus Shade Guide - Mint Flavor by Robin Evans

Working, but not at night. 4 stars because of white spots on the teeth. Other strips and whitening products did not. But I applied at my own risk. knowing it's possible. You are on the cheap side. You get what you pay for. Most of the time. Update: I've been using them for a long time. I have very sensitive teeth. This product is not as harsh as others I have tried. The amount of lightening I experience is not impressive. They seem to work best when I use them every day for a week. Or twice a day for several days. Instead of once or twice a week for maintenance. I am currently trying to find another product that is more effective. If you need a comparison with white crest stripes. Comb strips work better. HLTWS gave me less sensitivity.