Apr 5, 2024 · Soak Charcoal Grill Racks. The easiest way to clean charcoal grills is to brush the slightly warm grates with a grill brush after cooking. Then, soak them in hot water with dish soap. If your sink isn’t large, turn the grates periodically when cleaning a charcoal grill rack. Allow them to sit for an hour in the soapy water, then scrub the