Putting dish soap on cast-iron pans can have several consequences, but it's important to understand that occasional use of dish soap is not likely to ruin your cast iron if the pan is well-seasoned. However, using dish soap regularly or using it harshly can have the following effects:
Removal of Seasoning: The biggest concern with using dish soap on cast iron is that it can strip away the seasoning—the protective layer of polymerized oil that provides a non-stick surface. Seasoning takes time and multiple uses to develop, and using dish soap can break it down, making your cast iron prone to rusting and losing its non-stick properties.
Leaching of Soap Flavors: If you use a significant amount of dish soap or let the pan soak for an extended period, there is a chance that the soap's flavors can be absorbed into the cast iron. This could potentially transfer unwanted flavors to your food.
Increased Risk of Rusting: Dish soap is designed to remove grease and oils, and this includes the beneficial oils that protect your cast iron from rusting. If the soap strips away the seasoning and leaves the pan bare, it becomes more susceptible to rust, especially if not dried thoroughly.
Difficulty in Re-Seasoning: If you find that your cast iron has lost its seasoning due to using dish soap regularly, you will need to re-season it to restore its non-stick surface and protection against rust. Re-seasoning can be a time-consuming process, and it's best to avoid frequent stripping of the seasoning if possible.
To mitigate the consequences of using dish soap on cast iron, follow these tips:
Use Mild Dish Soap Sparingly: If you feel the need to use dish soap on your cast iron, use a small amount of mild dish soap and avoid leaving the pan to soak.
Avoid Abrasive Tools: Instead of using abrasive sponges or scouring pads, use a soft brush or non-abrasive sponge to clean your cast iron gently.
Immediate Drying: After washing, immediately dry the cast iron thoroughly with a towel, and you can even place it on the stovetop or in the oven to ensure it's completely dry.
Re-Season Regularly: If you notice your cast iron losing its seasoning, you can re-season it to restore its protective layer.
Remember, the occasional use of dish soap on cast iron is not catastrophic, but it's best to adopt gentle cleaning practices and prioritize the preservation of the seasoning to keep your cast iron in optimal condition.