A dish rack rusts when metal is exposed to water, oxygen, salt, food residue, detergent, and poor drying conditions for a long time. Even stainless steel dish racks can show rust-like marks if they are made from low-grade material, scratched deeply, stored in a damp area, or left with mineral deposits and acidic residue.

A dish rack stays around water every day, so rust is one of the first problems buyers and users think about. Once rust shows up, the rack does not only look worse. It also becomes harder to clean, less reliable in daily use, and much less appealing on a kitchen counter. That is why preventing rust starts long before the rack reaches the sink.