Cleans retainer with less hassle %26 mess than all other products. Can apply inside retainer to clean inside mouth or can apply to retainer %26 clean outside mouth in tray. I like it cleans the tray too. No brushing, rinsing or soaking so it saves time. It has hydrogen peroxide to kill 99.999% of germs and is safer for sensitive gums than bleach cleaners. It contains SLS so I won't wear it all night in my night guard. The foam dispenser bottle works well probably because the SLS and looks attractive. It's easy to use and has mild mint flavor. Had my retainer about 3 years so it didn't whiten retainer but did make it less cloudy %26 more clear. I highly recommend this product since it's more convenient, sugar free, gluten fee, less irritating and takes up less space than tablets. Less hassle to use than toxic tablets in indestructible foil wraps that cut your fingers. Doesn't burn my sensitive skin either like brushing with toxic soak tablets. Doesn't have nasty Blue %232 dyes like tablets.