EASY TO USE: Mix 1 packet of cleaner in ½ cup of warm water. Allow time for the solution to dissolve (about 3 minutes). Rinse appliance off before soaking in solution, and soak for at least 20 minutes. Rinse appliance off thoroughly before use. A CONVENIENT, CARE-FREE WAY TO CLEAN: You can leave your expensive oral appliance in the cleaner for 20 minutes or all day without worrying about damaging your investment (when tested by soaking an Invisalign retainer braces in the SmartGuard cleaning crystals for 336 hours straight, the clear retainer did not burn or turn the plastic retainer cloudy or leave a residue on Invisalign tray). PROTECT YOU INVESTMENT: Guaranteed not to discolor or darken your oral appliance. While other cleaners can damage, darken, and cloud your expensive appliances, SmartGuard will not. DOES NOT CONTAIN BLEACH. OVER 3 MONTH'S SUPPLY: 110 Cleanings – Remove stain, plaque, & odor – 11 packets per box, and each packet lasts 7-10 days. With SmartGuard, you can finally have your clear braces crystal clear and looking new again. CLEAR BRACES: Professional Strength Premium Cleaner designed for: Clear Braces, Retainers, Aligners, Night Guards, Dentures, Sleep Apnea Appliances, Dental Guards, and Snore Guards. Clean with the best cleaner on the market.