HW FLooring in spare half bath
The wood guys convinced us to extend the hw oak flooring we had installed on our first floor into a little half bath there. The installer removed the toilet and installed flooring underneath it and used a new wax gasket. A few years later and my wife notices black marks around the base of one side of the toilet. Its dry. I am wondering if the wood is stained from a leak...but it never seams wet. Could it be the toilet sweats? Could this be mold? Should I get some diluted bleach and try to wipe it away or could that harm the wood more so? Thoughts?