Highly Effective Mechanical Cleaning The Dr. B Ultrasonic Cleaner uses high-frequency ultrasonic waves to mechanically clean dentures and dental appliances. This device helps loosen debris, remove biofilm, stains and plaque. Always Use A Soak Cleanser The Ultrasonic Cleaner should always be used with a soak cleansing product to fully disinfect dental appliances. When used together, the Ultrasonic Cleaner helps the Liquid Crystal Cleanser penetrate the porous material of dental appliances for a deeper clean. Superior Functionality The Dr. B Ultrasonic Cleaner has 3 timer settings. Press the power button consecutively to set the timer for 5 minutes, 10 minutes and 15 minutes. When the cycle is complete, the device will shut off automatically. Instructions 1.Open lid and remove batteries and USB 2. Insert batteries or plug in USB to operate 3. Fill basin with water (though not completely full) and squirt 4 pumps of Liquid Crystal Soak Cleanser 4. Insert dental appliance into the solution 5. Close lid 6. There are 3 timer options with Auto Shut-off Press the power button 1x for 5 minutes, 2x for 10 minutes & 3x for 15 minute 7. Once the cycle is complete remove appliance and rinse thoroughly.