Review on 🧼 Efficient and Long-lasting SmartGuard Premium Cleaner Crystals & Cleaning Case: 110 Cleanings to Eliminate Stain, Plaque, and Bad Odor from Clear Braces, Dentures, Night Guards, Mouth Guard, Retainers. by Jessica Watts

After two years, my upper holder had a distinct yellow tinge. Reviews of this product show that it can help. It happened! After the first soak, I noticed that it became much cleaner. Two days later it looked like new again. As another reviewer pointed out, the container doesn't hold half a glass of liquid and your retainers (half a glass fills it to the brim), so I took their suggestion and used a small container like Tupperware. I have been telling friends about this product and am planning to stop by my orthodontist's office to see if they know!