Can you put cast iron in the dishwasher?

To put it simply, no, it is generally not recommended to put cast iron cookware in the dishwasher. This is due to a few important reasons, which we will discuss below.

1. Rusting and Corrosion: One of the primary reasons to avoid using the dishwasher for cast iron is the risk of rust and corrosion. Cast iron is susceptible to rust, and the high temperatures and moisture present in a dishwasher can strip away the seasoning and promote rust formation. Additionally, some dishwashing detergents can be harsh and abrasive, causing damage to the surface of the cast iron.
2. Seasoning: Another crucial factor to consider is the seasoning of your cast iron cookware. Seasoning is the process of creating a natural non-stick surface on the cast iron by layering it with a polymerized fat or oil coating. Dishwashers often use strong detergents that can strip away the seasoning, breaking down the protective layer and leaving your cookware vulnerable to rust and corrosion.
3. Harsh Cleaning Methods: Dishwashers usually employ high-pressure water jets to clean the dishes, which may produce enough force to damage the surface of the cast iron. This can cause the formation of chips or cracks, leading to a compromised performance of the cookware.

Cleaning Cast Iron by Hand

Now that it is established that the dishwasher is not suitable for cleaning cast iron cookware, let’s explore the proper way to clean your cast iron pieces by hand.

1. Immediate Cleaning: To prevent food from sticking and becoming stubborn to remove, it is recommended to clean your cast iron cookware immediately after each use. This can be done by carefully rinsing it under hot water. Avoid using harsh soaps or abrasive sponges as they can strip away the seasoning.
2. Gently Scrubbing: For tougher food residues, use a gentle brush or sponge to scrub away the residue while the cookware is still warm. Avoid using metallic scrubbers or harsh cleaning tools that can damage the seasoning.
3. Salt Scrub: To remove stubborn food or grease, you can create a salt scrub. Sprinkle coarse salt onto the cookware and scrub gently using a cloth or sponge. The salt acts as an abrasive agent without being too harsh on the surface.
4. Drying and Oil Application: After cleaning, ensure that the cast iron is dried thoroughly to prevent the formation of rust. You can either air-dry it or briefly heat it over the stove on low heat. Once dry, apply a thin layer of oil or fat to the surface to maintain the seasoning and protect the cookware.

While it may be tempting to toss your cast iron cookware into the dishwasher for convenience, it is best to avoid doing so. The high temperatures, harsh detergents, and abrasive cleaning methods found in dishwashers can damage the seasoning, promote rust formation, and compromise the durability of your cast iron pieces. Instead, opt for gentle hand washing methods to ensure your cookware stays in top-notch condition. By following the proper cleaning techniques and regular seasoning, your cast iron cookware can provide you with a lifetime of reliable and delicious cooking experiences.