Hi I purchased a used gqf cabinet bator for a really great deal. Come to find out, when I went to clean it out, it had the remnents of an explodded egg in it. Along with alot of mouse droppings. I have gotten alot of the loose stuff out, by vaccuum. But now what should I use? The rest of the stuff is caked on! Any ideas? What do you do to maintain it year to year?