If handled properly, cast iron skillets improve with age. Taste of Home says cooking oil absorbs into the pan, creating a nonstick surface.
Vigorous scrubbing or steel wool can ruin that effect, and long exposure to water can rust the pan,
so experts advise against putting cast iron in the dishwasher or soaking it in a sink.
All Recipes recommends using soap and water to clean cast iron pans. To remove stuck-on food, use a bristle brush
Pouring hot water into the pan loosens any particles. Spatula food bits. Dry with a towel or heat until all water evaporates.
The Kitchn suggests seasoning the pan with canola, grapeseed, or flaxseed oil and a paper towel.