We have an old product up here called CLR (Calcium, Lime, Rust).
People use it in dishwashers, washers, and COFFEE MAKERS!
Never used it, but this is like a 30 year old product so they must be doing something right.
Falken - Apprentice Auto Mechanic
2010 Honda Fit DX-A in Black
Current Fill: Pennzoil Ultra 5W20 SN, Wix 57356 Oil Filter, ATF DW-1, TC-W3 2T User