I've been washing my V-Tray and racks in the dishwasher, after a soak and light scrub to remove burnt on grease/food. I've been spraying them with PAM and haven't had any build up so cleaning is fast and easy. As for the interior, just like KyNola stated, I clean my door seals and tower area, where seals contact, with alcohol after every smoke. Once in a while I'll clean the door seal and tower exterior with a sponge of soapy warm water. That's it.... Once a year I'll scrape any flakey or heavily built up areas with a wire brush and/or putty knife, to remove and flakes or built up debris.