Calcium, Lime, & Rust Remover has long been known as an effective commercial cleanser for hard water stains and other buildup. We spoke to a CLR Brands representative to get some advice on how to ...

User u/whatsittoyaaa2464 says, ‘Use CLR [Calcium, Lime and Rust Remover, from Walmart]. I’m a full-time housekeeper, and I swear by that stuff. Make sure it’s covering the whole area.