Best Way To Remove Stains and Rust From Dishwasher?

Great question! I always refer to this great answer from GE appliances. Many customers have successfully removed the rust with this method:

1. Fill the detergent cup with three to four ounces of citric acid crystals and close the cup.
2. Run the dishwasher through a normal cycle.
3. Rinse thoroughly by running the dishwasher through another cycle without the crystals but with a full cup of detergent.
4. Repeat the process if one treatment did not completely remove the staining.