I learned something new. Goop, the hand cleaner, can mold and become very liquidy. A long, long time ago, a member recommended using non-pumice Goop to clean up sewing machines because it left decals intact. That last part is NOT true. Anyhoo, had some Goop and a particularly ugly, tarnished faceplate to clean so pulled out the Goop and discovered it had grown mold (black), changed color and was almost a liquid in essence. It also smelled. Didn't use the Goop but did clean up the faceplate.