What does " black mold " look like? I have this black soot like substance all over my apartment which is above a garage. (no vehicles are kept in the garage, just junk) The landlord tried to tell me it's from the heat. The T.V. screen is pitch black even though I cleaned it 5 days ago. Even the inside of the refrigerater has black smudge marks on the sides. Wherever I have something leaning up against the wall, when i move it there is a black outline all around where the item was. Thank you.