Opened your grill and found mould? Learn how to clean your mouldy BBQ in the UK safely using the burn-off method and reseasoning tips.
In the UK, damp air and condensation make mould in BBQs extremely common.
The good news?
You can safely clean a mouldy BBQ in the UK without harsh chemicals — and without ruining your grill.
In this guide, we’ll show you exactly how to:
- Clean mouldy BBQ grates safely
- Use the burn-off method correctly
- Prevent mould returning next winter
- Know when a BBQ is beyond saving
Why BBQs Go Mouldy in the UK
The UK climate is perfect for mould:
- Cold air
- High humidity
- Covered grills with no airflow
- Ash left in trays
Ash absorbs moisture, which accelerates mould growth and rust.
Is It Safe To Cook On a Mouldy BBQ?
Short answer:
Not until it’s properly cleaned.
But once fully burned off at high heat, mould spores are destroyed.
Mould dies at temperatures far below normal BBQ cooking temps.
So the key is controlled high heat first — not scrubbing it cold.
Step-by-Step: How To Clean a Mouldy BBQ in the UK
Step 1 – Remove Loose Debris
Take out grates and trays.
Step 2 – Burn It Off
Gas BBQ: Full heat, lid closed, 15–20 minutes.
Charcoal BBQ: Full chimney, lid closed, 20–30 minutes.
Electric smoker: Max temp, 30–45 minutes.
This carbonises mould safely.
Step 3 – Scrape While Warm
Brush grates thoroughly.
Empty ash.
Wipe loose residue.
Step 4 – Re-Season
Light oil coating.
Heat 15 minutes.
Cool naturally.
How To Stop Your BBQ Going Mouldy Again
- Empty ash after every cook
- Store charcoal indoors
- Leave vents slightly open
- Use breathable covers
- Do a short burn-off before long-term storage
When To Replace Instead of Clean
Replace if:
- Grates are deeply flaking
- Metal has rusted through
- Burner tubes are blocked
- Structural damage exists
Otherwise, 90% of mouldy BBQs are perfectly salvageable.
More Suggestions
Before your first cook, calculate perfect smoking times here
Always probe food to ensure it reaches safe internal temperatures
Electric smoker users should follow this cleaning method
After cleaning, aim for clean thin blue smoke
If your smoker struggles after winter, read this
If you’re new to smoking or BBQ then read our Beginner’s Guide
