As we probably have a lot of new people buying the smartcover , I thought I'd put together whet I've learned over the past year or so. I also detail a lot of boats and cars and learned how to care for surfaces. Cleaning: Leather SC: Use the Kiwi stuff here. At your shoe store - cheap... Rub it in with your fingers monthly, Lexol cleaner and sealer also works well. Actually any "hide food" product works well. Think of your shoes - how do you care for them? Poly: these things are indestructible and I hear they get dirty quick, mine don't. I use Windex, 409 or any gen purpose cleaner without harsh stuff like ammonia. "Tough Stuff" spray sold at auto part stores is good. Last year, some idiot was recommending you wash them in the dishwasher - worked great for a few times until the heat split the seams and ruined it. Duh.... Both interiors: The tough stuff foam listed above - a wet microfiber rag is fine also.