If your ceiling and walls are dirty (in my case, yellow from the previous owner smoking), a microfiber mop does a fast and amazing job of cleaning them. I sprayed it with a bit of Simple Green for the first pass, but I don't know if it was really necessary because the smoke residue seemed to come off fine with just water. I also used the mop to clean the outside of the fridge and cabinets, and several doors and shelves; anything big and flat, really. I recommend that you shorten the handle of the mop if you can. Don't worry about corners and small areas. You can spot-clean them afterward.