How to Clean a Grill: Quick Routine and Deep Clean

How often should you clean a grill?

Clean the grates after every cook, deep clean every 4-6 weeks during grilling season, and do a full teardown clean twice a year. Grill cleaning isn't one task. It's three tasks on three schedules, and mixing them up is why most people either over-clean or under-clean.

Skip the routine step and residue bakes onto the grates, so your next steak sticks and picks up a burnt, bitter flavor instead of a clean sear. Skip the seasonal step and grease builds up in places that can eventually catch fire, or rust sets into parts you can't easily replace.

Charcoal grills skip the burner work but add ash cleanup, one of the everyday trade-offs covered in our gas vs charcoal grill comparison.

The 10-Minute Routine Clean After Every Cook

The best time to clean grill grates is right after you finish cooking, while they're still hot. Warm residue scrapes off in seconds; the same residue left to cool turns into a hard, black crust that takes real scrubbing to remove.

Close the lid and let a gas grill run on high for 5-10 minutes after you pull the food off. The heat carbonizes leftover grease and food bits into ash you can brush away. On a charcoal grill, push the coals to one side and brush the hot grates directly.

Then wipe the grates with a damp cloth or paper towel held in tongs, scrape any obvious grease out of the drip tray, and wipe the exterior if anything dripped down the front. If you use a wire brush, glance over the grates for loose bristles before the next cook, since a stray bristle can end up stuck to food. Replace any brush that has started shedding.

Pair this routine with the prep habits in our grilling tips for preventing sticking, like oiling hot, clean grates right before the food goes on.

How do you deep clean grill grates?

Soak the grates in warm, soapy water for 15-20 minutes, scrub them with a stiff brush, then rinse, dry completely and oil them. Pull the grates out and set them in a large tub, utility sink or heavy-duty trash bag filled with warm water and a squirt of dish soap.

For stubborn spots, spread on a paste of baking soda and water, let it sit for 10 minutes, then scrub. It works well without damaging the metal. Rinse thoroughly and dry the grates completely, since water left sitting on bare cast iron can start rusting within a day.

Once dry, wipe the grates with a thin coat of a high-smoke-point oil, like canola or vegetable oil, using a paper towel. This reseasons cast iron and helps stainless grates resist rust and sticking.

If your grates are porcelain-coated, skip the metal wire brush. A stiff nylon brush or a grill stone gets the job done without chipping the coating, and once porcelain chips, that spot will rust from underneath.

Cleaning the Burners and Heat Plates

Underneath the grates on a gas grill sits the part most people never clean: the burner tubes and the metal heat plates (also called heat tents or diffusers) that sit above them and catch dripping grease.

With the gas turned off and the tank disconnected, lift out the grates and heat plates and brush off the built-up grease and ash. Then brush the burner tubes and use a thin piece of wire, such as an unbent coat hanger, to clear the small gas ports along each tube. A clogged port causes uneven flames and cold spots. Avoid toothpicks or matches, since a broken piece left inside a port can block gas flow.

While you're in there, look for spider webs or small nests inside the burner tubes. Spiders and insects like the sheltered space during the off-season, and a blocked tube can push gas out where it shouldn't go, creating a flashback risk the next time you light the grill.

On a charcoal grill, this step means emptying and brushing out the ash catcher and charcoal grate once the ash has fully cooled. Wait at least 24 hours after your last cook, since coals can hold heat far longer than they appear to, and dump the ash into a metal container.

How often should you empty the grease trap?

Check the grease trap every couple of cooks and empty it once it's about half full. Every grill with a lid has some version of a grease trap or drip pan under the cooking area, usually a small metal or foil tray that catches what runs off the grates.

A tray that's allowed to fill all the way is one of the more common causes of backyard grill fires, since overflowing grease can drip onto a hot burner or the ground below. Old grease also smokes and leaves a stale taste on food, one of the common grilling mistakes that ruin good food.

Let the grease cool completely, then scrape it into the trash, never down a drain, where it hardens and clogs the pipe. Wash the tray with warm, soapy water. Lining it with aluminum foil before your next cook makes the next cleanup as simple as lifting the foil out.

Cleaning the Exterior Without Damaging the Finish

The outside of the grill gets grease splatter and fingerprints, and it gets cleaned the wrong way more often than any other part.

On stainless steel lids and side panels, wipe in the direction of the grain with warm water and a few drops of mild dish soap on a soft cloth, then dry with a microfiber towel to avoid water spots. Skip abrasive scouring pads and anything with bleach, since both can dull or discolor stainless steel permanently.

Painted or powder-coated exteriors only need warm, soapy water. Avoid oven cleaners and harsh degreasers on painted surfaces, which can strip the finish and invite rust.

Don't forget the control knobs, igniter button and the shelf underneath, where grease and dust collect unnoticed. An old toothbrush cleans around knobs without letting water drip into the valve assembly.

Pre-Season Cleaning: Getting Your Grill Ready for Spring

Before the first cookout of the season, your grill needs more than a wipe-down, especially if it sat outside all winter.

Check gas hoses and connections for cracks or brittleness, then do a simple leak test: brush soapy water onto the connections and open the gas without lighting the grill. Bubbles at a connection mean a leak, and that fitting needs to be tightened or replaced before you use the grill.

Check the date stamped on the propane tank's collar. Standard tanks need requalification 12 years after manufacture, and many refill and exchange services won't fill an out-of-date tank. Clear any insect nests from the burner tubes, wipe the inside of the lid where moisture collects, and lubricate stiff hinges.

Finish by running the grill on high with the lid closed for 10-15 minutes. This burns off dust and residue and gives you a chance to spot uneven flames before you're standing there with a plate of raw chicken.

End-of-Season Deep Clean and Winter Storage

The cleaning you do before putting the grill away matters as much as the cleaning before you use it, because whatever grease and moisture you leave behind will sit there for months.

Do a full teardown clean: grates soaked and scrubbed, heat plates and burners brushed out, grease tray emptied and washed, and the interior wiped down. Make sure every part is completely dry before reassembling, since trapped moisture over winter is one of the fastest routes to a rusted-out grill.

Give cast iron grates a slightly heavier coat of oil than usual before storage. For gas grills, disconnect the propane tank and store it outdoors, upright, away from the grill and out of direct sun, never inside a garage or house.

Use a breathable grill cover rather than an airtight plastic tarp, which traps condensation and encourages rust. If you have the space, keeping the grill somewhere dry, like a garage or covered patio, beats leaving it exposed to snow and freeze-thaw cycles.