When it comes to cleaning cast iron, it is generally recommended to avoid using soap, especially during the regular cleaning and maintenance process. The seasoning on a cast iron pan is a thin layer of polymerized oil that provides a natural non-stick surface and protects the iron from rusting. Soap can strip away this seasoning layer.
Instead, it is best to clean cast iron pans with hot water and a stiff brush or non-abrasive sponge. Use the brush or sponge to scrub away any food particles or residue. If needed, you can add a small amount of coarse salt to help with the scrubbing process. Afterward, rinse the pan thoroughly with hot water and dry it completely.
If you encounter stubborn, stuck-on food that cannot be removed with water alone, you can use a plastic scraper or a pan scraper specifically designed for cast iron to gently lift the residue. Avoid using metal utensils or abrasive cleaners as they can damage the seasoning.
Remember to always dry your cast iron pan thoroughly after washing to prevent rust. You can place it on a stove burner over low heat for a few minutes to ensure it is completely dry. To maintain the seasoning and protect the cast iron, it's a good idea to apply a thin layer of oil or fat after each use.
While it's generally not recommended to use soap on cast iron, some experts suggest that a small amount of mild dish soap can be used for a deep cleaning if necessary. However, this should be done sparingly and followed by thorough rinsing and re-seasoning to restore the protective layer.
Overall, the key is to avoid harsh chemicals, abrasive materials, and excessive scrubbing to preserve the seasoning and integrity of your cast iron cookware.