eXempt visual water flosser is rated IP67 waterproof. To learn how to clean your water flosser, please follow the below steps: 1. Clean the outside of the device by a soft cloth and cleanser. 2. Clean the water reservoir by warm water for 30-45 seconds. 3. Clean the tip heads by rinsing them under warm water. We recommend to complete this process every 1-3 months to keep your water flosser performing at its best.