Cigarette burn on outdoor slate porch
My daughter has been puting out her cigarettes on the slate since she smokes outside. This is the first time that there are burn marks. We usually just sweep up. I don't know what she is doing that is different.
I was just out there scrubbing with steel wool. I used an all purpose cleaner, then I used clorox clean up. They look lighter, but are still there.
Any tips on if I can remove them?