This product adopt ultrasonic principium, it clean out rapidly and completely albumen deposition covering the surface of contact lens, and no need to dip in lens care solution for a long time.Operating instructions:1. First wash your hands, then gently pull out the cover to wash and clean2. remove the lens basket and use tweezers to put the left contact lens into basket which marked with L, same as the right contact lens3. Fill the cleaner to the upper edge of the stainless steel tank with the lens care solution. Do not overfill4. Place the cover with the contact lenses back into the tank5. Make sure the AC adapter is attached to the cleaner, and plugged into a socket6. Press CLEAN, the green light on, which indicates the cleaning, the cleaner will automatically shut offNote:Immediate repeat of cleaning may cause damage or weaken certain types of lenses, and thereby cause injury risk to the eyesWash your hands before touching the contact lens and the inside of the cleanerDo not use tap water to clean or rinse the lens. Always use fresh cleaning solution for each cleaning. Never reuse the solutionDo not directly wash the unit for preventing from damage. Condition: New