Washing cast iron cookware, such as a cast iron skillet or Dutch oven, in the dishwasher is generally not recommended. The high temperatures, harsh detergents, and water pressure in dishwashers can strip away the seasoning on the cast iron, leading to rust and deterioration of its non-stick properties.
If you accidentally washed your cast iron cookware in the dishwasher and notice that the seasoning has been damaged or removed, it's essential to reseason it to protect the surface and maintain its non-stick qualities. Here's how you can reseason your cast iron:
Wash and remove any remaining residue: After taking the cast iron out of the dishwasher, wash it with warm soapy water and a soft brush or sponge to remove any leftover food particles or detergent.
Dry it thoroughly: Pat the cast iron dry with a clean towel, ensuring there is no moisture left on the surface.
Apply a thin layer of oil: Using a paper towel or cloth, apply a thin layer of vegetable oil, flaxseed oil, or any other high-smoke-point oil to the entire surface of the cast iron, including the handles.
Remove excess oil: Wipe off any excess oil so that only a thin, even layer remains. Too much oil can lead to a sticky finish.
Bake the cast iron: Place the cast iron upside down on the oven's center rack and put a foil-lined baking sheet or aluminum foil on the bottom rack to catch any drips. Bake at around 375°F (190°C) for about an hour.
Allow it to cool in the oven: Turn off the oven and let the cast iron cool down inside the oven.
After reseasoning, your cast iron should have a renewed non-stick surface and improved resistance to rust. To maintain the seasoning, avoid using soap to clean the cast iron in the future, as soap can break down the seasoning. Instead, use warm water and a brush or sponge to clean it. If there are stubborn food residues, you can use coarse salt to scrub the surface gently. Always remember to dry the cast iron thoroughly after washing to prevent rusting.
With proper care and regular seasoning, your cast iron cookware can last a lifetime and provide you with excellent cooking performance.