I live in a small town in Southern North Carolina close to the coast. My question - We live a brick house about 45 years old. All around the inside of the house especially the woodwork around the bedroom and closet doors there is brownish yellow spots. I clean them off and they come back some won't wash off. It is even on some clothing especially leather. Whats going on?
photos can be seen on this link.. https://spoteddoors.shutterfly.com/pictures/10#9