First, make sure that the walls of the furnace and ash are very cold. Wear old clothes, gloves, and a mask so you don’t breathe dust. Arm yourself with a spoon and broom to remove the ashes. After the ash has been removed, cover the bottom of the furnace with an old newspaper so you can continue cleaning in a more carefree way: it will drop a lot of soot! Additionally, if you’re too busy to clean your own furnace, you can always call some of the finest Furnace cleaning services near your area.
Clean the smoke vent first
If the funnel only has one access from above, after the roof/terrace is completely safe, brush the inside of the smoke vent but only after closing the mouth of the smoke vent with a plastic sheet so as not to fill the soot house.
If the smoke vent has a fixed lid, you should continue to clean the smoke vent starting from the mouth. Also, in this case, you have to close the entrance with a plastic sheet but you have to leave the entrance for the brush and your arms that have to accompany it with circular movements to free the smoke vent wall from soot.
How to wash a furnace
Finally, remove the plastic sheet and sheet of newspaper and then proceed with the removal of the falling soot.
After all the dust has been removed, continue with washing: clean with a solution of water, sodium bicarbonate, and white wine vinegar. If the furnace is equipped with a cast iron plate, you can polish it with simple furniture oil.
How to clean the furnace glass
You can use ash to clean the glass.
Ash is very basic and is used in saponification, for the production of alkaline caustic. What does this mean? That to clean the furnace glass will be quite a large soft sponge, from boiling water and furnace ash.
How do you clean smoke vents that are opaque and dirty?
Soak a large, soft boiling water sponge
Immerse the sponge in the ash
Rub the ashes on the surface of the tempered glass to clean
Repeat until the glass is clear, clean and new.
Although ash is caustic, it is not suitable for cleaning cast iron plates where it causes cracking.