Its actually very simple, just wash the complete cooler with water and you are done. You can use a bucket or water pipe or best car washer to clean your cooler. This should be done periodically when there is dust accumulation on the Brownkol pads or at least after summers are over. But its better to just wash every month to enhance the life of cooling pads and get best cooling effect. Just make sure you cover all electrical parts and motor with a plastic sheet or bag. Enjoy cool and fresh air!