Keeping your ThermaDoor panels clean and dry is the best way to extend their life. Wipe them down with a damp cloth and mild soapy water, and for tougher marks use a gentle household cleaner. Avoid harsh products like thinners, ammonia, acetone or abrasive pads, as they can damage the laminate surface and void the warranty. Always clean up spills promptly and avoid prolonged exposure to moisture or steam.