How to Clean and Protect Your BBQ over Winter

How to Clean and Protect Your BBQ Over Winter

When the last burger is flipped and the evenings start drawing in, it's tempting to throw a cover over the grill and forget about it until spring. But a few hours of care now can add years to your BBQ's life. Damp, frost, and months of neglect are the biggest killers of grills, and they're mostly avoidable.

Here's how to put your BBQ to bed properly, and how to keep it in good shape until the sunshine returns.

Why Winter Is So Hard on a BBQ

Grease and food residue left on a grill don't just sit there. They attract moisture, encourage rust, and can turn rancid or mouldy. Add damp air, rain, and freeze-thaw cycles, and even a good-quality grill can start to deteriorate. Pests also love a greasy, sheltered spot, so an uncleaned BBQ makes a very tempting winter home for mice and insects.

Step 1: Give It a Deep Clean

Don't skip this. Cleaning before storage is the single most important thing you can do.

Grates: Burn off any leftover residue by heating the grill on high for 10-15 minutes, then scrub with a stiff grill brush while the grates are still warm. For stubborn build-up, soak them in a bucket of hot, soapy water for an hour, then scrub and rinse.

Burners and flavour bars (gas grills): Remove and brush off debris. Check burner ports for blockages, as a thin wire or paperclip works well for clearing them. Look for any signs of corrosion or cracking.

Inside the lid and firebox: Scrape off flaking carbon and grease. Contrary to popular belief, that black flaking isn't "seasoning". It's carbon build-up, and it can peel onto your food.

Drip tray and grease cup: Empty, scrape, and wash with hot, soapy water. These are the most common sources of grease fires and pest attraction.

Charcoal grills: Empty out all the ash. Ash holds moisture and is highly corrosive, so leaving it in over winter is a recipe for rust.

Exterior: Wipe down with warm, soapy water and a soft cloth, then dry thoroughly. For stainless steel, wipe in the direction of the grain.

Step 2: Dry Everything Completely

Moisture is the enemy. After washing, leave all parts to air-dry fully, or dry them with a towel. Then run the grill on low for a few minutes (gas) or leave the lid off in a dry spot for an afternoon (charcoal) to drive off any hidden damp.

Step 3: Protect Against Rust

Once everything is clean and dry:

• Oil the cast iron and steel grates with a thin coat of cooking oil (vegetable or rapeseed works well). This creates a barrier against moisture.

• Touch up chipped paint with high-temperature BBQ paint to stop rust taking hold on exposed metal.

• Wipe stainless steel surfaces with a light film of stainless steel polish or a tiny amount of oil to repel moisture.

Step 4: Handle Your Fuel and Gas Safely

Gas bottles: Disconnect the regulator and store the bottle upright, outdoors, in a well-ventilated spot. Never store gas cylinders indoors, in a garage attached to your house, or in a shed with poor airflow.

Charcoal: Keep it somewhere completely dry. Damp charcoal is difficult to light and burns poorly. A sealed plastic tub or a sack stored off the ground works well.

Step 5: Choose the Right Storage Spot

The best option is a dry, sheltered place like a shed or garage, away from damp walls. If your BBQ has to stay outside, move it to the most sheltered spot you have, ideally against a wall and out of the prevailing wind and rain. Raise it slightly off the ground on bricks or wooden blocks if you can, since sitting in standing water speeds up rust.

Step 6: Invest in a Proper Cover

A good BBQ cover is cheap insurance. Look for one that is:

• Waterproof and breathable. Fully waterproof covers with no ventilation can trap condensation underneath, which is worse than no cover at all.

• Properly sized. It should fit snugly without straining at the seams.

• Secured with straps or toggles. Winter gales have a habit of sending loose covers into the neighbour's garden.

• UV-resistant, since winter sun can still degrade cheap fabrics.

If your cover has gathered water in a hollow on top, empty it regularly so it doesn't pool and seep through.

Step 7: Don't Forget the Accessories and Outdoor Furniture

While you're at it, give your tools, covers, and nearby furniture some attention too:

• Wash and dry your tongs, spatulas, and brushes, and store them indoors.

• Clean any wooden or rattan furniture, then cover or move it under shelter.

• Store cushions indoors. Damp cushions go mouldy quickly.

• Treat wooden furniture with a suitable outdoor oil or sealant before the worst of the weather arrives.

Step 8: Check In Occasionally

Even a well-prepared BBQ benefits from a quick look every month or so. Lift the cover on a dry day, let it air out, check for condensation or signs of rust, and make sure nothing has moved or been disturbed by critters. It takes two minutes and can save you a nasty surprise in spring.

Bonus: Can You Grill in Winter?

If you're a year-round griller (and plenty of people are), you don't have to pack everything away. Just clean the grill more often, position it well away from walls, fences, and anything flammable, never use it in a garage or enclosed space, and keep it covered between cook-ups. Cold weather also means longer heat-up times and higher fuel use, so keep a spare gas bottle or extra charcoal on hand.

Spring-Ready Checklist

• ✅ Grill deep-cleaned inside and out

• ✅ Grates oiled and parts completely dry

• ✅ Ash and grease removed

• ✅ Gas bottle disconnected and stored safely

• ✅ Charcoal kept dry

• ✅ Waterproof, breathable cover fitted and secured

• ✅ Accessories cleaned and stored

• ✅ Monthly check-in scheduled

Final Thoughts

A little effort in autumn means you'll be ready to fire up the grill the moment the weather turns. A clean, dry, well-covered BBQ will cook better, last longer, and keep your food tasting the way it should. Your future self, standing in the spring sunshine with a perfectly working grill, will thank you.