UltraGlowiSimple Retainer Cleaner That Makes Your Daily Care Routine Easy And Gives Great Results Getting Better Cleaning Results For Your Daily Routine? The ultrasonic technology works at 40 kHz frequencies that go into small spaces in your retainers, removing bacteria and plaque that you cannot clean by hand, giving you the same clean results like professional dental offices every time. Looking For Equipment That Stays Strong For Years? Made with industrial