I have an old house, which was built in 1940. I'm removing the old casing around the living room windows, and replacing it with new stained window casing. When I removed the old windows, I noticed they still had the old window weights. I also, noticed a steel like taste in my mouth when working around the windows. Do you know what that may be and is it dangerous to be exposed to whatever that is causing the taste in my mouth?
Please help, thank you.