Putting oven-safe steel or cast iron cookware in the dishwasher can harm the cookware and should generally be avoided. There are several reasons why it's not recommended:
Water exposure and rust: Steel and cast iron are susceptible to rust when exposed to water for extended periods. Dishwashers use water at high temperatures, and the prolonged exposure can cause the cookware to develop rust, leading to degradation and potential health hazards.
Detergents and chemicals: Dishwasher detergents are typically designed to remove food residues and stains from dishes. However, the strong chemicals in these detergents can be harsh on steel and cast iron surfaces, causing the cookware to lose its seasoning or protective coating.
Abrasive cleaning action: Dishwashers use powerful jets of water to clean dishes. The forceful water spray, combined with the presence of other dishes and cutlery, can cause steel or cast iron surfaces to become scratched or chipped.
Damage to seasoning: Cast iron cookware is often seasoned with a layer of oil or fat to prevent rust and enhance non-stick properties. Dishwashing can strip away this seasoning, reducing the cookware's performance and making it more susceptible to rust.
Potential warping: The high heat and forceful water in dishwashers can cause uneven heating and cooling of the steel or cast iron, potentially leading to warping or distortion of the cookware's shape.
To maintain the quality and longevity of your oven-safe steel or cast iron cookware, it's best to hand wash them using a gentle dish soap and warm water. Avoid using abrasive scrubbers or harsh cleaning agents. After washing, make sure to thoroughly dry the cookware with a towel or by placing it on a low flame for a short time to remove any remaining moisture. Additionally, it's essential to season cast iron cookware regularly to maintain its non-stick surface and prevent rusting.
Remember that proper care and maintenance of steel and cast iron cookware will help ensure they last for many years and retain their cooking performance.