Last updated: 22 March 2026
How to Clean a Gas BBQ: Step by Step Guide
You lift the lid and the smell hits you: last month's burnt marinade, a layer of grey grease, and something unidentifiable welded to the grates. The thought of scrubbing it feels worse than just ordering a takeaway. But here is the truth: if you clean for 5 minutes after each cook, you never face that nightmare again. And a yearly deep clean adds 3 to 5 years to your BBQ's life.
A dirty BBQ ruins food flavour, shortens grill life and creates fire hazards from grease build-up. The good news: cleaning a gas BBQ takes 15 minutes after each cook and 45 minutes for a deep clean once a month. Follow this guide and your BBQ will last years longer.
After Every Cook (5 Minutes)
- Burn off residue. Close the lid and turn all burners to high for 10 minutes. This incinerates food particles and grease.
- Brush the grates. Use a brass-bristle brush (not wire, which can shed dangerous fragments). Brush in the direction of the grate bars.
- Empty the grease tray. Pull out the disposable drip tray and replace it. A full tray is a fire risk.
- Wipe the exterior. Damp cloth on the lid and side tables while they are warm (not hot). Removes fingerprints and sauce splashes.
Monthly Deep Clean (45 Minutes)
- Remove the grates. Soak in hot soapy water for 30 minutes. Scrub with a non-scratch sponge. For stubborn spots, bicarbonate of soda paste works well.
- Remove Flavorizer bars. These sit above the burners and deflect drips. Scrape off carbon build-up and soak if needed. Replace if rusted through.
- Clean the burner tubes. Use a bottle brush to clear each port. Check the venturi tubes (where air mixes with gas) for spider webs. Spiders love nesting in gas tubes during UK winters.
- Scrape the firebox. Use a plastic scraper on the inside walls. Push debris down through the grease management system into the drip tray.
- Clean the grease management. Remove any grease collection components, wash with hot soapy water, dry and replace.
- Wipe and reassemble. Dry all parts thoroughly before reassembling. Apply a thin coat of vegetable oil to cast iron grates.
Annual Spring Service
Before first use each year:
- Check gas hose for cracks, perishing or rodent damage. Replace if any damage found (£15 to £25).
- Test gas connections with soapy water (bubbles = leak).
- Check ignition system. Replace battery if piezo. Clean electronic igniter tip with fine sandpaper.
- Inspect burner tubes for blockages. Spiders, insects and condensation cause problems over winter.
- Check wheels, handles and side tables for loose bolts. Tighten with a spanner.
Winter Storage Checklist
UK winters punish outdoor BBQs. Rain, frost and rodents cause more damage in 4 months of storage than an entire summer of cooking. Follow this checklist in October to protect your investment.
- Full deep clean before storage. Never store a dirty BBQ. Grease attracts mice and foxes.
- Disconnect the gas bottle. Store it upright, outdoors, away from heat sources. Never bring propane indoors.
- Apply cooking oil to cast iron grates. A thin coat prevents rust formation over winter.
- Block the burner tubes. Stuff clean aluminium foil loosely into each venturi opening. Spiders and insects nest inside during autumn and block gas flow by spring.
- Fit the cover. A proper fitted cover (£30-50) is the single best investment for longevity. Universal covers flap in wind and let rain pool on the lid.
- Elevate off wet ground. If stored on grass, place on paving slabs or a wooden pallet. Ground moisture corrodes the underside of the cart frame.
- Check in January. Lift the cover, inspect for condensation or rodent activity. Replace desiccant packs if you placed any inside.
Products We Use for BBQ Cleaning
After testing dozens of products over 8 years, here is our actual cleaning kit. Nothing fancy, nothing expensive.
Weber Bamboo Grill Brush
£14.99. Brass bristles (not steel). Will not shed dangerous wire fragments into food. Lasts 2 seasons.
Ecover Washing Up Liquid
£2.50. For soaking grates. Non-toxic, biodegradable, rinses clean. Do not use on cast iron (soap strips seasoning).
Bicarbonate of Soda
89p from any supermarket. Mix into paste with water for stubborn carbon deposits. Works better than most branded BBQ cleaners.
"Save your money on branded BBQ cleaning products. Bicarbonate of soda paste, a brass brush and elbow grease clean any gas BBQ better than a £12 spray. I have cleaned over 500 grills and never needed anything more."
— Marcus Bawdon, author of Food and Fire (Quadrille, 2019)
