What should I do with the drip pan after using the grill?

After using the grill, remove the pan from the oven and pour the hot fat into a container. Wash the pan in hot water using a sponge and washing-up liquid. If greasy residues remain, immerse the pan in water and detergent, or wash it in the dishwasher, or use a commercial oven detergent. Never put a dirty pan back into the oven. (Page 10)