No, it is generally not recommended to use hot water to wash cast iron cookware. Cast iron is a porous material that is prone to rusting, and hot water can accelerate this process. Here's the proper way to clean and care for cast iron:
Wait for it to cool down: After cooking with cast iron, allow the cookware to cool down before cleaning. Placing a hot cast iron pan under cold water can cause it to warp or crack.
Use warm water: When cleaning cast iron, use warm water instead of hot water. Warm water is sufficient to clean off most food residues and won't damage the seasoning of the pan.
Avoid harsh detergents: Avoid using harsh detergents or abrasive scrubbers, as they can strip away the seasoning—the layer of polymerized oil that gives cast iron its non-stick properties. Instead, use a soft sponge or brush to gently clean the surface.
Use a brush or scraper: If there are stubborn food bits stuck to the pan, you can use a brush or scraper designed for cast iron to remove them gently.
Dry immediately: After washing, dry the cast iron cookware immediately with a towel or on low heat on the stovetop. Avoid air-drying, as moisture can lead to rusting.
Re-seasoning: If your cast iron starts to lose its seasoning or shows signs of rust, you can re-season it to restore its non-stick properties. To do this, apply a thin layer of vegetable oil or melted shortening to the entire surface of the pan, including the handle, and heat it in the oven at 375°F (190°C) for about an hour. Let it cool in the oven before removing.
By following these guidelines, you can maintain the integrity and longevity of your cast iron cookware and keep it in excellent condition for many years of use.