Use a butter knife to scrape off baked on food and drippings. Food tends to stick on cast-iron radiants more than stainless steel ones. To prevent this, preheat the grates before cooking. Spray the food lightly with a nonstick spray if possible to prevent sticking.
Remove the radiants, or grills, daily. Scrub them with a wire brush in hot soapy water. The radiants are made of either cast-iron or stainless steel, and are the main cooking surface on a charbroiler.
Empty out the grease and water pans after each use. The ceramic briquettes need to flipped after each use as well in order for the heat to clean them.
Clean the rest of the charbroiler with a sponge or soft cloth to prevent rust and deterioration. Use only soap and water.