The first time I used CLR Calcium Lime Rust Remover was many years ago when I lived in an apartment that had rusty water.  The inside of the dishwasher would get stained with rusty blotches and I was at a loss as to how to get it clean.  Someone recommended running a dishwasher cycle with CLR in the detergent compartment.  I did so, and was thrilled that when I opened the dishwasher door I was greeted with a sparkling white interior.  This stuff really blasts through rust stains.

Fast forward several years, and I remembered that CLR can also power through hard water and calcium deposits. ...