A clean gas grill cooks better and lasts longer, and the cleaning is simpler than most owners fear: burn off the grates after each cook, brush them while warm, empty the grease tray before it overflows, and give the burners and the interior a deeper clean once or twice a season. The trick is matching the method to the part — grates take heat and a brush, burners take gentle handling and a clear port, and stainless surfaces take mild cleaners that will not void the warranty. This guide breaks the grill into zones, explains what to do and how often, and finishes with a seasonal deep clean.
What needs cleaning and how often
| Zone | After each cook | Weekly | Seasonal |
|---|---|---|---|
| Grill grates | Burn off and brush warm | Deep brush; oil if needed | Full scrub and re-season |
| Grease tray / drip pan | Check level | Empty and wipe | Replace liner or pan |
| Burners and ports | — | Visual check | Gentle clean, clear ports |
| Interior and lid | Wipe spills when cool | — | Scrape, wipe, inspect |
| Exterior | Wipe splashes | — | Wash, touch up, cover |
The frequency table works because it spreads the work: the thirty-second burn-off after cooking prevents the weekly chore, and the weekly wipe prevents the seasonal overhaul. Grills fail from neglect in the grease tray and the burners, not from the visible grates — so the parts you cannot see at a glance are the ones that need the schedule most.
Grate care: burn-off and brushing
The grate is the part you touch with food, and it cleans best with heat. After cooking, leave the grill on high with the lid closed for ten to fifteen minutes so the residue burns to ash — this is the "burn-off" that turns sticky grease into powder. Then brush the grate while it is still warm: the ash and carbon lift off easily at heat, while a cold grate holds every smear. Use a brush with brass or stainless bristles appropriate to your grate material, and check the brush's condition before each use — a brush losing bristles into the food is worse than a dirty grate.
Match the brush to the grate. Cast-iron grates take a stiff brush and benefit from a light oiling after cleaning to resist rust; stainless and porcelain-coated grates need gentler tools to avoid scratching the coating. If a residue has baked on past the brush, heat the grate again or use a grill stone or damp cloth on the warm surface rather than attacking it cold with harsh scrapers. The goal is a clean cooking surface, not a mirror — a seasoned-looking grate with no loose debris is healthier for food than a scoured one that has lost its coating.
Burners: cleaning without damage
Burners need gentle care because their job is delivering gas evenly, and a damaged burner delivers uneven heat or unsafe flames. Before any burner work, turn the grill off, disconnect the fuel and let everything cool completely. Remove the grates and any heat plates to reach the burners, then inspect each burner for clogged ports, debris and corrosion. Clear blocked ports with a small wire or a pipe cleaner rather than poking them with a hard tool that can enlarge the holes; brush the burner surface gently to remove flakes, and check that the burner tubes are free of spider webs and debris that can block gas flow.
Reassemble the burners exactly as they came apart, confirm each sits in its correct position, and reconnect the fuel before running a leak test on the connections with soapy water. Light the grill and watch the flame pattern — a steady blue flame across the burner means the ports are clear; yellow, flickering or uneven flames mean a port is still blocked or the burner is misaligned. If a burner is corroded through or cracked, replace it rather than cleaning around damage; burner replacement is normal maintenance, not a sign the grill is finished.
Treat the heat plates, burner covers and deflectors — the parts between the burners and the grates — as part of the burner system, not the grate system. They sit in the grease path and collect drippings that vaporize into flavor during a cook, but a thick buildup can block heat and cause flare-ups. When you remove the burners for a deep clean, brush or scrape these plates too, and replace any that have rusted through, because their job is to spread heat evenly and protect the burners below. Reassemble them in the correct order over the burners so the grill's heat pattern returns to normal on the first light after cleaning.
Grease management
The grease tray is the part most owners discover only when it overflows. Check the tray after each cook and empty it before it reaches the fill line — hot grease overflowing onto a deck or patio is both a mess and a fire hazard. Most grills use a drip tray or foil liner that makes emptying a two-minute job: pull the tray, dump or wrap the liner, wipe the tray and replace it. Keep the tray and the area under the burners clear of built-up grease, because grease fires start where drippings collect near the heat source.
If your grill sits on a wood deck or a surface you want to protect, add a fireproof mat under and around the unit. A mat catches grease drips, sparks and flare-ups before they reach the deck, and it is far easier to clean than the patio boards. Position the mat to cover the area where the cook stands and where grease can splash, and clean the mat with the grill rather than letting it become a permanent stain. Grease management is the least glamorous part of grill care and the most important — the tray and the mat are what keep a grill from damaging the space around it.
Dealing with rust
Rust on a gas grill needs a straight answer: surface rust on grates and painted exteriors is cosmetic and treatable; rust through a burner, a heat plate or the firebox structure is a safety issue and calls for replacement. On grates, scrub the rust with the appropriate tool and re-season the surface with a high-heat oil; on painted exterior panels, sand the rust gently, touch up with high-heat paint and keep the grill covered. Never paint the inside of the firebox or the burners — coatings near the flame can burn off and contaminate food.
Prevent rust by keeping the grill dry. Cover it when cool, store it under an eave or cover if the climate is wet, and dry the grates and interior after cleaning rather than closing the lid over a damp grill. Check the drip tray area for water collection, since trapped moisture rusts from the bottom up. A grill that lives under a cover and gets its grates oiled after cleaning will show far less rust than one left open to every rain — the prevention is boring, and it works.
The seasonal deep clean
Twice a year — at the start of the season and before winter storage — give the grill the full treatment. Start with the fuel disconnected and the grill cool. Remove the grates, heat plates and burners; scrape and wash the interior of the firebox with warm soapy water, rinse and dry it completely; clean or replace the drip tray liner; brush and oil the grates; and wipe the exterior with a cleaner suited to its finish. Before reassembly, inspect every part: burner condition, hose cracks, regulator fittings and any corrosion. Reassemble, reconnect, leak-test and light the grill to confirm the flame pattern before the first cook.
End the deep clean with the outside surfaces and the cover. Wash the exterior, dry it, and check the cover for holes that would let water pool on the grill through the winter. If the grill is an island model, the same steps apply to its cabinets and counters — clean the surfaces, check the hardware and cover or shelter what you can. Big Horn's six-burner deluxe island and 4+2 burner island follow the manufacturer's care guidance for stainless, and a fireproof grill mat plus the grills and griddles collection round out the setup.
A clean gas grill is a reliable one: burn off and brush after each cook, keep the grease tray empty, treat the burners gently and deep-clean twice a year. The routine takes minutes when it is regular and hours when it is not — so the smart money is on the minutes, and the grill rewards the habit with even heat, better flavor and a longer life.
These steps are general guidance, and models vary: follow the manual for your specific unit, and verify temperatures with a clean thermometer where the text calls for one. Product details reflect official Big Horn Outdoors listings reviewed September 5, 2026; re-check prices and availability at checkout.
