Clean the interior using a putty knife to scrape off burnt-on food particles inside your grill. This isn’t just aesthetic. Build-up prevents your grill from heating correctly.
If you have a grease drain, make sure it’s unclogged by running a coat hanger down it. Just keep your hands away from the grease bucket, because the grease will drain out fast and could burn you.
Season the grill. Use nonstick cooking spray to oil the grates, drip pans and inside of the grill. This helps keep food from sticking to the surfaces and speeds cleaning. Light the grill and let it burn empty with the lid closed for 30 minutes to burn off the preservatives.
Level the grill. If one side of your grill burns burgers while the other leaves them raw, it’s probably not level. Check both side-to-side and front-to-back to ensure even heating.
Check for leaks by inspecting connections for tightness and hoses for cracks. Another good way to scope out leaks is by brushing non-ammonia soapy water around the fitting with an old toothbrush. Turn the gas on and watch for bubbles.