We had a carpet that we were considering replacing. But wanted one last cleaning before deciding. In the den was a "silly putty" disaster which had been on the floor for five or so years. We thought of cutting it out, and other solutions,but when Don came and looked at it he said he could eliminate the spot. It was as big as a pint jar lid. He did and after the carpet was cleaned, it looked new. We were very impressed. Needless to say we will not be replacing our carpet. Good job!!!