Dirty Glass

There can be three types of deposit causing dirty stove glass.

Dirt – Usually white smears. This is just deposits of wood ash and needs to be cleaned to improve the appearance of the fire.

Tar – An oily type of film – when minor, becoming brown treacle colour and even as black as road tar and impenetrable to light. This is as a result of the fire not being hot enough to cause complete combustion. Deposits can build up in the chimney and a chimney fire can easily result. This can be avoided by adopting two approaches; using dry fuel (<20% moisture content) and changing how the fire is operated. It is important to avoid over fuelling the fire for example letting the fire run very low and filling the firebox. Operating the stove at minimum output, with the top control closed will also cause this. A good rule of thumb is to refuel with no more than twice the weight of fuel which is left in the firebox. So if the fire is nearly out then add only a little fuel then let this burn properly before adding more fuel. This prevents the new fuel from overcooling the fire and causing it to burn in a sooty manner.

Sooting – A dusty, powder-like residue. This again is as a result of the fire burning incorrectly. The temperature of the fire is too low for the fuel to be properly burnt. Often this is accompanied by tar – but not always. If you are to use waste wood such as planks or MDF then the fuel will often produce too much flame in the early stages of operation after refuelling. This would then overwhelm the ability of the fire to burn the carbon in the flames, even if the fire is hot. There will then be sooting of the fire in the cold regions of the stove, usually the glass and around the door frame.

Cleaning the glass – There are two products available from Corinium Stoves that will clean the glass in your stove door effectively. These are the Stovax Glass Cleaning Gel and the Vitcas Stove Glass Cleaner spray (available from our showroom).

Other than these two products, you can clean the glass using a damp cloth dipped into the bed of ash at the bottom of your stove. The acid in the ash helps to clean any dirty smears.