How to Clean Your Log Burner Glass, Using the Ash Already in the Grate

Autumn's the time most log burners get lit again after a summer sat cold, and it's usually the glass that shows it first — a season's worth of soot left it looking more grey than clear. Before you buy a chemical glass cleaner, it's worth knowing the ash already sat in your grate will do the job just as well, for free.

Why the glass blackens in the first place

Soot and creosote build up on the glass when wood doesn't burn cleanly — usually a sign the wood's too damp, the airflow's restricted, or the fire's been left smouldering on a low flame rather than burning properly. A hot, well-ventilated fire burning properly dried wood produces far less of the residue that ends up on the glass to begin with.

What you need

• Fine, dry ash from the grate (cold ash, not anything still warm)
• A damp sheet of newspaper or a damp cloth
• A dry cloth for buffing

The method

1. Make sure the burner is cold. Never clean the glass while there's any heat in the stove.
2. Dampen your newspaper or cloth. It needs to be wet enough to pick up ash, not dripping.
3. Dip it into the fine ash from the grate — this is your abrasive. Wood ash is mildly alkaline and just gritty enough to lift soot without scratching the glass, which is exactly why it's worked as a cleaning method for as long as people have had stoves and fireplaces.
4. Rub the ash over the sooty glass in small circles, working section by section. You'll see the soot start to lift almost immediately.
5. Wipe away the residue with a clean, damp section of newspaper or cloth.
6. Buff dry with a separate dry cloth to bring back the shine, the same way you'd finish cleaning a window.

Repeat for any patches that haven't fully lifted. Stubborn, baked-on soot from a long period of neglect might take a second pass.

Preventing it next time

The single biggest factor in how quickly your glass blackens is how dry your wood is. Damp logs burn at a lower temperature and produce far more smoke and soot, most of which ends up coating the inside of the glass rather than going up the flue. Logs kiln dried to under 20% moisture — like every net we deliver — burn hotter and cleaner, which means less soot on the glass and less of this job to do throughout the season.

A couple of other habits help too: give the fire enough air to burn properly rather than shutting it right down to make it last longer, and avoid letting it smoulder on a low flame overnight if your stove allows it — a fire that's actually burning, rather than just glowing, is the one that keeps your glass clear.

If you're stocking up for the season, our Kindling & Firelighters collection will get a cold stove going properly from the first light, and if you're not sure how much you'll need through winter, we've broken that down here.

Kiln Dried Logs Jersey delivers Woodsure Ready to Burn certified firewood free across all 12 parishes.