Here’s the secret weapon: citric acid powder. It’s cheap, smells like a lemon party, and eats rust for breakfast. Pour a half-cup directly into the detergent drawer and run a hot cycle (empty machine, please). It’s like giving your washer a detox spa day.
Rust Marks On Clothes From Washing Machine | Detroit Chinatown
If you’re out of citric acid, two cups of white vinegar will do the trick. Just don’t mix it with bleach—that creates toxic gas and a bad day. I once used vinegar and walked around smelling like a pickle for hours, but my stains vanished.