Do not use benzene, oil or fatty detergent to clean the remote controller. Deformation may occur.
The remote controller is waterproof, but it should be kept dry as much as possible.
If the water filter is covered with debris, the hot water will not run smoothly, or cold water may come out. Clean the filter as explained below.
To avoid burns, wait until the equipment cools down before draining the water. The appliance remains hot after it is turned off.
Water filter Maintenance
Source: Noritz (support.noritz.com)