How do you all clean your smoker grates after a smoke? Bringing it into the kitchen to clean in the sink leaves a huge mess (and guarantees the dreaded look of disapproval from the misses). Spraying off with a hose doesn't work. I've tried putting them on the grill and heating up to 500 or so then using a grill brush. Works okay but the grates slide around making it difficult and doesn't do a great job. Had anyone used the "ammonia in a trash bag" trick? Does it work. Thanks!!