Washing a cast iron skillet with water is generally safe and necessary for cleaning, but it requires some additional steps to ensure the skillet remains in good condition. If you don't properly care for a cast iron skillet after washing, it can be susceptible to rust and lose its seasoning (a layer of polymerized oil that gives it its non-stick properties). Here's what will happen if you wash your cast iron skillet without proper care:
Rust formation: Cast iron is prone to rusting if it is exposed to water and not dried thoroughly. If you wash your cast iron skillet and leave it wet or store it in a damp environment, it can develop rust spots, which will affect its cooking performance and appearance.
Loss of seasoning: Washing a cast iron skillet with water and harsh detergents can strip away the seasoning (the natural non-stick layer). This can make the skillet more prone to sticking and require re-seasoning to restore its non-stick properties.
To properly wash a cast iron skillet:
Wait until it cools: Allow the skillet to cool down before washing to avoid warping or cracking.
Use warm water: Rinse the skillet with warm water and use a soft sponge or brush to remove any food residues. Avoid using soap, as it can strip away the seasoning.
Avoid soaking: Do not soak the cast iron skillet for an extended period, as prolonged exposure to water can promote rusting.
Dry immediately: After washing, dry the skillet thoroughly with a clean towel to prevent rust formation. You can also place it on a stovetop over low heat for a few minutes to ensure it's completely dry.
Re-season if necessary: If the skillet has lost its seasoning or is starting to stick, you may need to re-season it. To do this, apply a thin layer of vegetable oil or solid shortening to the skillet's surface and heat it in the oven at a specific temperature for a designated time.
With proper care, including regular seasoning, a cast iron skillet can become naturally non-stick, durable, and develop a beautiful patina over time.