You don't necessarily have to wash your cast iron pan after every meal, but it is essential to maintain it properly to ensure its longevity and cooking performance. Here's what you should know:
Immediate Cleaning: After each use, it's a good idea to clean your cast iron pan as soon as possible to prevent food particles from sticking and becoming difficult to remove later.
Minimal Soap: Contrary to popular belief, using a small amount of mild soap to clean your cast iron pan is generally acceptable and won't damage the seasoning. However, using harsh soaps or soaking the pan for extended periods should be avoided, as it can strip away the seasoning.
Avoid Soaking: Soaking a cast iron pan for long periods can lead to rust formation. Instead, use warm water and a sponge or brush to clean off any food residue. If you encounter stubborn, stuck-on food, you can add some coarse salt and gently scrub it away.
Re-seasoning: Regular seasoning is vital to maintain the non-stick surface of your cast iron pan. After cleaning, dry the pan thoroughly with a towel and then apply a thin layer of cooking oil to the cooking surface. Heat the pan on the stove until the oil starts to smoke, then remove it from the heat and let it cool. This process will help maintain the seasoning and protect the pan from rust.
Watch Out for Acidic Foods: Avoid leaving acidic foods (e.g., tomatoes, vinegar-based sauces) in the cast iron pan for an extended period, as they can erode the seasoning and impart a metallic taste to your food.
Regular Maintenance: Even if you don't use the pan for every meal, it's a good practice to check and maintain your cast iron cookware regularly. If you notice any signs of rust or a degraded seasoning, it's time to re-season the pan.
Use Appropriate Utensils: When cooking with cast iron, use utensils that won't scratch or damage the seasoning, such as wooden or silicone ones.
In summary, cleaning your cast iron pan after every meal is a good practice to maintain its quality. However, as long as you're diligent with cleaning and seasoning, you can extend the time between washes if needed. Just be sure to follow the appropriate cleaning and maintenance steps to keep your cast iron pan in excellent condition.