It's generally not recommended to wash iron vessels, such as cast iron cookware, in a dishwasher. Cast iron is a porous material that requires special care to maintain its seasoning and prevent rusting. Washing it in a dishwasher can lead to several potential issues:
Rust: Dishwashers use water and detergent, and the prolonged exposure to moisture can cause iron vessels to rust. Rust can damage the seasoning of the cast iron and negatively impact its cooking performance.
Detergent and abrasives: Dishwasher detergents and the dishwasher's cleaning process can be harsh on cast iron surfaces. They may strip away the protective seasoning layer, making the cookware more prone to rusting and food sticking.
Temperature fluctuations: Dishwashers use high-temperature water for washing and drying. Rapid and extreme temperature changes can cause cast iron to warp or crack.
To take care of your iron vessels properly:
Hand wash: It's best to wash cast iron cookware by hand using warm water and a soft brush or sponge. Avoid using harsh soaps or abrasive cleaning pads that can damage the seasoning.
Dry immediately: After washing, dry the cast iron thoroughly with a towel and then place it on the stove over low heat to ensure all moisture is removed.
Seasoning: Periodically re-season your cast iron cookware to maintain its non-stick surface and protect it from rusting. Seasoning involves applying a thin layer of oil and heating the cookware in the oven.
Avoid soaking: Avoid soaking cast iron in water for prolonged periods, as this can also lead to rusting.
By following these care instructions, you can keep your cast iron vessels in excellent condition and extend their lifespan for many years of enjoyable cooking.