The practice of never washing a cast iron skillet with soap is a common recommendation among many enthusiasts of cast iron cooking. The reasoning behind this advice is that soap can strip away the seasoning—the layer of polymerized oil that forms on the surface of the pan—which contributes to its nonstick properties.
However, it's important to note that proper hygiene and cleanliness in the kitchen are essential for food safety. While it is true that excessive use of soap and harsh scrubbing can degrade the seasoning, it doesn't mean that soap should never be used.
Here are some guidelines to maintain the hygiene of a cast iron skillet:
Seasoning preservation: Avoid using excessive soap and vigorous scrubbing, as it can remove the seasoning. Instead, try using a gentle scrub brush or a non-abrasive sponge to clean the skillet.
Hot water rinse: After cooking, rinse the skillet with hot water while scrubbing it gently. This helps remove any food particles and residue.
Light soap usage: If the skillet has stubborn food residue, it's acceptable to use a small amount of mild soap. Make sure to rinse it thoroughly with hot water afterward.
Drying: Dry the skillet immediately after washing to prevent moisture from causing rust. You can use a cloth or towel, or even place it on low heat on the stove until it is completely dry.
Oil application: After cleaning and drying, it's recommended to apply a thin layer of oil to the skillet to maintain its seasoning and prevent rust. Use a neutral oil like vegetable oil or flaxseed oil, and wipe away any excess.
By following these guidelines, you can strike a balance between maintaining cleanliness and preserving the seasoning of your cast iron skillet. Remember, the goal is to keep the pan clean and free of harmful bacteria while avoiding excessive use of soap and aggressive cleaning methods.