The firebox can be extinguished by simply letting the combustion take place completely. Charcoal will be consumed almost entirely. Poking the bottom grid with a metal rod will cause the residual ash to fall into the ashtray.
Prepare a clean, flat surface to “demold” the foodstuff out of the cage grills.
Lay the cage grill flat to remove the pins and the lid grids. The pins will not be too hot as they reflect infra-red radiations.
The cage grill can then be flipped over a large tray (see the “Accessories” tab) or a wooden cutting board. Gently hit the cage grill on the tray or board to detach the foodstuff from the cage grill. The “demoulding” using such method is very fast.