Rust-colored stains or corrosion spots on the interior or on dishes.

Steps:

• Remove rusting items: Do not wash non-dishwasher-safe metal items that can rust.
• Inspect racks: Look for chips in the rack coating. Replace racks or use rack repair coating to cover exposed metal.
• Clean interior: Use a stainless steel cleaner suitable for dishwashers to remove surface rust stains.
• Check water quality: If water has high iron content, consider a whole-house filter.