Clean cast iron with hot water and salt, never soap or the dishwasher.
- Dry and oil the skillet after every wash to prevent rust.
- Sticky or flaking seasoning means strip and reseason the pan.
Why does cast iron rust, stick, or flake?
Rust forms when moisture sits on bare iron. Soap strips the seasoning, which is polymerized oil. Sticking happens when the pan lacks a smooth, baked-on layer. Flaking occurs when seasoning is built too thick or unevenly. Acidic foods like tomatoes can also break down seasoning. Overheating an empty pan burns off the protective layer.
How do I clean a cast iron skillet step by step?
First, scrape off loose food with a metal spatula or chainmail scrubber. Rinse the pan under hot running water while scrubbing with a stiff brush. For stuck bits, make a paste of coarse salt and water, then scrub in circles. Rinse again and dry with a lint-free towel. Place the skillet on a burner over low heat for two minutes to evaporate all moisture. Rub a dime-sized drop of neutral oil, like canola or grapeseed, over the entire surface. Wipe off the excess with a paper towel until the pan looks dry.
Can I use soap on cast iron?
Modern dish soaps are milder than the lye-based soaps of the past. A small amount of gentle dish soap is safe for well-seasoned pans. Avoid heavy degreasers or antibacterial soaps. If your seasoning is thin or patchy, skip soap altogether. Soap becomes risky only if you soak the pan or scrub aggressively.
How do I fix sticky or flaking seasoning?
Sticky seasoning comes from too much oil left on the pan. Heat the skillet on the stove until it smokes, then wipe it clean. For flaking, strip the pan completely. Coat it with oven cleaner in a plastic bag overnight, then scrub off the old seasoning. Wash, dry, and reseason with a thin oil layer. Bake the skillet upside down at 450°F for one hour. Repeat the oiling and baking three times for a durable base.
How do I prevent rust and keep seasoning strong?
Dry the skillet immediately after every wash. Never leave it wet in the sink. Store it in a dry place, ideally with a paper towel inside to absorb moisture. Cook fatty foods like bacon or cornbread early in the pan's life. Avoid simmering acidic sauces for long periods. Reapply a light oil coat after each cleaning if the pan looks dull.
When should I replace or strip a cast iron skillet?
Strip the pan if seasoning is flaking into food or rust covers more than half the surface. Replace it if you see deep cracks, warping, or a rough pitted texture. Cast iron can last decades with proper care. A warped pan won't sit flat on electric coils. Cracks can expand and cause the pan to break during cooking.