How To Get Black Soot Off The Wall

Yes, the air/fuel ratio could be off as you guys have said.

How To Get Black Soot Off The Wall. There are cleaning solutions that may work, but typically the finish ends i tried cleaning the porcelain tile which is never a problem to clean but the black just spread more. There is a sealed fireplace which they were not to use, not sure if that is the cause of soot or not.

Sooty Boilers, Furnaces, Water Heaters: Cause, Problems, Cure
Sooty Boilers, Furnaces, Water Heaters: Cause, Problems, Cure from inspectapedia.com
Hold the nozzle about 1 inch from the wall to avoid smearing the soot while vacuuming. Soot is the residue left by smoke. But i used to only take the top one inch back to plain metal the rest just had the soot removed what i learned in scouts many years ago is:

Any thoughts on what is causing it and how to clean/treat surfaces so it doesn't reappear?

The acidic nature of soot makes it difficult to remove. An easy way to get soot or black marks off walls or a ceiling with a simple tool. I've got fever, kong, gasped skelton. Removing soot from walls and furnishings is sometimes achieved with commercial and/or professional cleaning products designed for that purpose.