C.W.
I've had that happen also. You can buy iron cleaner, I would try JoAnn's or where they sell Irons. It is a cream and it comes in a small bottle. You could also call your Manufacturer and find out what to do. That is a typical problem, you may look in your manual also, it might tell what to do. Don't panic, you don't need to trash your iron unless the cleaner doesn't help. Good Luck