Stove: blackening of glass. Burnt on residue.

tea and coffee

I have a Dovre multifuel stove.
Firstly I find the glass gets cloudy and then completely opaque after an hour or so.
Secondly, there is a hard burnt on deposit (since Christmas ) on the glass that no amount of polishing and as of yesterday, scrubbing is taking off.
We normally burn coal which is marked as suitable for a multifuel. Over Christmas we burnt some logs. I think they might have been a bit damp.
It's a 9 kw in a large room.
There is a lever at the bottom which I can push in/ pull out. Not sure which way it is meant to be. There is also a riddling plate which swivels.

Can anyone please
1. Explain to me why glass keeps blacking up.
2. How to get the burnt on deposit off the glass
3. Which way I am meant to have the vent / lever at the bottom. Thanks

coffeyt

Can't advise on that particular stove unfortunately as i have a Boru stove but there is a lever on ours known as the airwash lever which when kept open is supposed to prevent the glass getting too cloudy.
Even with that it will still get cloudy and a build up of residue after a while.
However a tip for the cleaning from my mum (after spending hours scrubbing and special products bought to no avail) was to get a damp cloth and dip it in the ashes and then use that to clean the glass, this really seems to do the job.

Corca Baiscinn

Ours is multifuel but different brand and we burn logs all the time so not sure I can help but yes logs def need to be dry. I concur with Coffeyt above re cleaning glass with ash, we used to scrub ours with Brillo but think it ws on a Boards thread I read re the ash! Our info that came with stove says that a high heat should keep the glass clean but of course you don't want a blazing fire the whole time. It's also important I think not to have the fuel in contact witht he glass. Re your bottom lever, don't know if ours is the same but we haave one at the bottom (wheel) and one at top side (lever) and we use as dampers to control the amount of air inflow. So when fire is first lit both are open, whenn fire is going well both are closed or one v slightly open, (which one depends on what you're burning). If fire goes down too much open more 'ti itl gets going again

TonyM.

You can use sugar soap to clean the glass.

MAJJ

coffeyt wrote: »

Can't advise on that particular stove unfortunately as i have a Boru stove but there is a lever on ours known as the airwash lever which when kept open is supposed to prevent the glass getting too cloudy.
Even with that it will still get cloudy and a build up of residue after a while.
However a tip for the cleaning from my mum (after spending hours scrubbing and special products bought to no avail) was to get a damp cloth and dip it in the ashes and then use that to clean the glass, this really seems to do the job.

If burning wood ashes is ok to use to clean but I have read not to use ashes from coal as it can mark the glass.

Dakota Dan

MAJJ wrote: »

If burning wood ashes is ok to use to clean but I have read not to use ashes from coal as it can mark the glass.

Whoever told you that was talking nonsense, I use ashes for years on my boru stove burning coal and timber and it never marks the glass.

cursai

Dakota Dan wrote: »

Whoever told you that was talking nonsense, I use ashes for years on my boru stove burning coal and timber and it never marks the glass.

Eh. What about the diamonds in the coal?

looksee

Ashes are the best for glass cleaning - bit of wetted kitchen paper, dip in the ashes, scrub round, turn it round and wipe clean with the dry side. Done!

Slattsy

Find oven cleaner spray foam works wonders to clean mine.

NIMAN

You can buy plenty of specialist stove glass cleaners.

I had a gel one once, really good. You smeared it all over the glass, left 5mins and dirt came off very easily.

Now I just spray with a standard window cleaner, leave for a couple of mins and remove it with a spare razor blades. Comes off easily enough.

Tiger31

tea and coffee wrote: »

I have a Dovre multifuel stove.
Firstly I find the glass gets cloudy and then completely opaque after an hour or so.
Secondly, there is a hard burnt on deposit (since Christmas ) on the glass that no amount of polishing and as of yesterday, scrubbing is taking off.
We normally burn coal which is marked as suitable for a multifuel. Over Christmas we burnt some logs. I think they might have been a bit damp.
It's a 9 kw in a large room.
There is a lever at the bottom which I can push in/ pull out. Not sure which way it is meant to be. There is also a riddling plate which swivels.

Can anyone please
1. Explain to me why glass keeps blacking up.
2. How to get the burnt on deposit off the glass
3. Which way I am meant to have the vent / lever at the bottom. Thanks

We burn a mixture of coal and logs, and get a blackening of the glass. An oven cleaner aerosol and tissue will shift it, and a squirt of window cleaner to finish off

_Brian

tea and coffee wrote: »

I have a Dovre multifuel stove.
Firstly I find the glass gets cloudy and then completely opaque after an hour or so.
Secondly, there is a hard burnt on deposit (since Christmas ) on the glass that no amount of polishing and as of yesterday, scrubbing is taking off.
We normally burn coal which is marked as suitable for a multifuel. Over Christmas we burnt some logs. I think they might have been a bit damp.
It's a 9 kw in a large room.
There is a lever at the bottom which I can push in/ pull out. Not sure which way it is meant to be. There is also a riddling plate which swivels.

Can anyone please
1. Explain to me why glass keeps blacking up.
2. How to get the burnt on deposit off the glass
3. Which way I am meant to have the vent / lever at the bottom. Thanks

Most stoves have the facility to have air run down across the glass, it helps a bit.

It sounds like you have some resin from poorly dried timber on your glass. If it’s too hard to wash off you should be able to burn it off. Good big hot fire. We have a very large stove, 30kw multifuel. Sometimes when it’s warmer we have smaller fires burning and the glass would dirty quite badly. But one decent big fire will burn it clean no bother.

Doctors room ghost

Open the wheels out to the last when she's good and hot and she should burn off the black on the glass.most multi fuels have an air wash.
If it's black in the morning when you clean it out use window cleaner sprayed on glass and one of the green scrub sponges that are green and yellow and kitchen roll to dry.give glass good spray scrub with green rough side and dry. I use that for years and don't scratch glass.dont put chemicals on the fire rope though cos you will damage it.reason for black glass is not enough air in the burn chamber and fuel is partially smothered and not burning clean.coal is dirty but if stove is burning hot with enough air she will clean herself

micks_address

We use a kitchen metal scrub that you'd use for saucepans and does the job for cleaning the glass. Was worried about scratches but never any problems

One_Of_Shanks

There is an actual stove glass cleaner on the market. We bought it and it's excellent. Think it was around 9 euro and its lasted over a year so far.
A quick spray and then wipe with kitchen towel.

This is NOT the brand we use, but its the only one that came up when I googled it, so you get the idea:
https://www.homestoreandmore.ie/detergents/hg-stove-glass-cleaner-05l/invt/060175

As for the blackening of the glass. I found it annoying too and eventually discovered that simply keeping the logs/nuggets further back away from the glass when lighting fire and putting in fuel, it stopped happening entirely.

The stove glass cleaner is still worth getting to keep the glass lovely and clean anyway though.

shaunr68

For minor blackening a baby wipe usually suffices, heavier deposits use a wet tissue dipped in ash or for really stubborn deposits an oven cleaner spray. I have also had good results with bicarb and lemon juice mixed into a paste and left to soak on the glass.

gomamochi1

Oven cleaner water es down with water your only man to clean the glass .