While throwing your tube set in the freezer is a great way to prevent anything funky from happening, if you are hydrating with anything other than water you will want to keep it clean. All of our components are removable for easy cleaning. 1. Disconnect the drink tube from the reservoir. 2. Grasp the bite valve in one hand and tube in the other then pull the valve firmly to remove the bite valve from the tube. 3. Gently remove the silicone sheath from the valve and clean with a cleaning tablet or mild soap and water. 4. Clean the inside of the tube by inserting the NDURE Brush in the open end of the tube and scrub. 5. After drying the components, carefully reattach the sheath to the valve and re-install.