You’ll want to clean out the interior section of the grill, as well, removing bits of food and grease that fall into the bowl of the grill to prevent flare-ups.
Cleaning a gas-grill interior‌
The burners inside the gas grill eventually may become covered in grime, so you should run a brush over them to pop grime out of the holes where the flame appears.
If the burners have a flame shield over them to distribute heat, you should be able to pull the shields out and wash them separately with dish soap.
Scrape the interior of the grill to loosen and remove any buildup of grime and food particles.
Cleaning a charcoal-grill interior‌
Clean the ash and remaining briquettes out of the bowl of the charcoal grill after every one to three uses. If you can tip the grill to pour out the ash, this is the best method.
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Scrape the interior of the grill bowl to loosen and clean out any remaining residue. You can use mild dish soap with warm water or a degreasing spray to finish cleaning the interior of the grill.

