It's been a year and wanted to clean my wsm. So I sprayed it down with oven cleaner and let it sit for a few hours. Than I loaded it up in my car and went to a high pressure car wash. Scrubbed it down and than sprayed it off. I than scrubbed it down again using dish soap and rinsed it off. It turned out pretty clean. Should I burn some charcoal in it to heat it up and burn off any residue that my possibly be left on?