How to Deep Clean a Gas Grill
Restore a gas grill's cooking performance and safety by breaking down internal components, scraping carbon buildup, clearing burner ports, and washing the cookbox.
- Read the tools, materials, safety notes, and steps below for free.
- Tap Start Camera Coach when you want hands-free voice help.
- Allow camera and microphone. Point your phone at the work; the coach watches your progress and tells you the next step.
🧰 Required Tools & Equipment
- ✓ 1.5-inch plastic or flexible metal putty knife
- ✓ Stainless steel or brass wire grill brush
- ✓ 5-gallon wash bucket
- ✓ Garden hose with adjustable spray nozzle
- ✓ Shop vacuum with narrow crevice nozzle
📦 Materials & Supplies
- ✓ Concentrated degreasing dish soap (or citrus grill cleaner)
- ✓ Heavy-duty non-scratch scouring pads
- ✓ Microfiber towels
- ✓ Replacement aluminum drip pan liner
- ✓ Nitrile work gloves
- ✓ High smoke-point cooking oil (canola or avocado)
⚠️ Safety Checkpoints & Warnings
- • Verify the LP tank valve is tightly closed and the regulator hose is disconnected before opening the grill.
- • Ensure all internal components and cast iron grates are completely cold to the touch before applying water or cleaner.
- • Wear safety glasses when scraping carbon flake build-up off the underside of the lid to prevent eye irritation.
📋 Step-by-Step Guide (6 Steps)
Disconnect Gas and Strip Internal Components
Shut off the propane tank valve clockwise and disconnect the regulator hose. Lift out the cooking grates, flavorizer bars, and bottom heat deflectors, setting them on cardboard or grass.
- • Disconnected LP gas regulator resting freely away from tank
- • Cookbox fully empty showing bare burner tubes and lower basin
- • Removed grates and flavorizer bars lined up flat on work surface
- • Leaving the gas line pressurized while working inside the manifold area
- • Stacking heavy cast iron grates on top of each other, chipping the porcelain enamel
Scrape the Lid and Cookbox Walls
Scrape the peeling carbon buildup inside the hood using your putty knife in broad overlapping strokes. Work your way down the cookbox walls, pushing all loose ash and charred debris toward the bottom drain funnel.
- • Lid interior cleared of flaking black carbon deposits
- • Cookbox aluminum side walls showing raw metallic finish
- • Loose debris collected in lower hopper or vacuumed clear
- • Mistaking carbonized grease buildup on the lid for peeling paint and using harsh chemical paint strippers
- • Using excessive force with sharp cornered tools that gouge the aluminum casting
Clean and Unclog Burner Tube Ports
Hold your wire brush perpendicular to the burner tubes and scrub across the gas flame ports across the full length of each tube. Use a small drill bit or paperclip to poke open any individual holes plugged with carbon or grease.
- • Burner ports completely open with uniform circular holes
- • No spider webs or debris covering the air shutter screens near the front controls
- • Brushing lengthwise along the tube, which shoves crust directly into adjacent gas holes
- • Spraying pressurized water directly into the burner tube air intakes
Degrease Flavorizer Bars and Cooking Grates
Spray both sides of the flavorizer bars and grates thoroughly with degreaser and let sit for 5 minutes. Scrub aggressively with a heavy-duty scouring pad and warm soapy water, then rinse completely with the garden hose.
- • Grates free of baked-on brown grease and charred food lumps
- • Water running clear off the flavorizer bars without suds or oil slick
- • Using stainless steel wire brushes aggressively on porcelain-enameled cast iron, which micro-fractures the coating
- • Reinstalling cast iron grates while soaking wet, leading to rapid surface rust
Clear the Slide-Out Grease Tray and Catch Pan
Slide the bottom grease tray completely out of the grill cabinet. Scrape coagulated fat into a trash bag with your putty knife, wash the tray with soapy water, and discard the disposable foil liner in the catch pan below.
- • Slide-out tray funnel free of solid grease dams
- • New, clean aluminum foil catch pan seated firmly inside the lower bracket
- • Cabinet floor beneath the tray clean and dry
- • Forgetting to replace the lower aluminum foil cup, causing rancid grease to overflow into the storage cart
- • Scraping hot grease into thin plastic bags that can melt
Reassemble, Season, and Perform Burn-Off
Slide the clean bottom tray in, reinstall the heat deflectors, flavorizer bars, and cooking grates. Rub cast iron grates with a thin coat of high smoke-point oil, reconnect the gas tank, and run all burners on high for 10 minutes.
- • All internal components seated symmetrically in their factory notches
- • Steady blue flames with small yellow tips extending uniformly across all burner ports
- • Thin vapor burning off the grates, subsiding after 8-10 minutes
- • Applying thick pools of cooking oil that turn sticky and gummy instead of polymerizing
- • Leaving the lid closed unattended during initial burn-off
Credit: inspired by an original tutorial by Dave's House of BBQ & More — watch the original on YouTube.
Don’t have everything?
- No Putty knife? Stiff plastic kitchen spatula or wooden paint stirrer
- No Commercial grill degreaser? Warm water mixed with Dawn dish soap and baking soda paste
- No OEM aluminum catch pan? Standard 8x5-inch disposable aluminum mini loaf pan