Emily ParkerBy Emily Parker

Updated November 2026

Washing a cast iron skillet is simpler than most people expect. With hot water, a soft brush and a few minutes of drying, you can clean the pan after cooking without stripping the seasoning that makes it nonstick. This guide walks through how to wash cast iron skillet correctly, what to avoid, and how to store it so it stays rust-free.

Why Washing Cast Iron Differs From Other Pans

Cast iron develops its nonstick surface from seasoning, a layer of polymerized oil bonded to the metal. Harsh detergents and long soaks can break that layer down. The goal is to remove food residue while leaving the seasoning intact, and that takes less scrubbing than most cooks assume.

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How to Wash a Cast Iron Skillet, Step by Step

  1. Wipe out the pan while it is still warm. Use a paper towel or cloth to remove loose food and excess fat. Warm iron releases residue more easily than cold iron.
  2. Rinse with hot water. Run the skillet under hot tap water. For stuck-on bits, let the pan sit in hot water for a few minutes rather than soaking it overnight.
  3. Scrub gently. Use a stiff nylon brush or a sponge with a little mild dish soap if needed. Modern dish soaps are generally gentle enough for seasoned iron, though many cooks prefer skipping soap entirely for routine cleaning.
  4. Remove stubborn residue with coarse salt. Add about a tablespoon of coarse kosher salt to the warm pan and scrub with a folded paper towel or cloth. The salt works as a mild abrasive.
  5. Dry completely. Dry the pan by hand, then set it over low heat on the stovetop for 2 to 3 minutes until no moisture remains.
  6. Apply a thin layer of oil. Rub a few drops of neutral oil, such as vegetable or flaxseed oil, over the cooking surface with a paper towel. Wipe off any excess so the surface feels dry, not greasy.

What to Avoid When Cleaning Seasoned Iron

Most seasoning damage comes from a few habits. Soaking the pan in water for hours invites rust. Running it through a dishwasher exposes the iron to water and detergent for an extended time, which almost always causes problems. Using steel wool or abrasive scouring pads can scrape off the seasoning layer. If food is burned on badly, a longer soak in hot water followed by gentle scrubbing is safer than aggressive scraping.

Storing Your Skillet After Washing

Storage matters as much as cleaning. Keep the pan in a dry cabinet or on a stovetop burner that you use regularly. Moisture trapped in a damp cupboard is the most common cause of rust. If you stack pans, place a paper towel between them to absorb any residual humidity and protect the surface.

Common Mistakes to Avoid

  • Letting the pan air-dry instead of drying it on the burner, which leaves water trapped in the pores.
  • Putting cold water on a very hot pan, which can cause warping or cracking.
  • Skipping the thin oil coat after washing, leaving bare iron exposed to humidity.
  • Using heavy detergent or soaking the pan for long periods.
  • Scrubbing with steel wool when a nylon brush and coarse salt would do the job.

A stiff nylon brush gives you enough grip to lift stuck-on food without scratching the seasoning. View on Amazon

Coarse kosher salt works as a natural abrasive for loosening residue without harsh chemicals. View on Amazon

A flaxseed or neutral cooking oil spray makes the post-wash oil coat quick and even. View on Amazon

FAQ

Can I use dish soap on a cast iron skillet?

Yes, a small amount of mild dish soap is generally fine for seasoned iron when used briefly. Rinse thoroughly and dry the pan right away to prevent rust.

How do you wash a cast iron skillet that has food stuck to it?

Fill the pan with hot water and let it sit for 5 to 10 minutes to loosen the residue. Then scrub with a nylon brush or coarse salt, rinse, dry on the stove and re-oil.

Is it safe to put cast iron in the dishwasher?

No, dishwashers expose cast iron to prolonged water and harsh detergent, which strips seasoning and promotes rust. Hand washing is the safer choice.

Conclusion

To wash a cast iron skillet well, clean it while warm, scrub gently, dry it completely on the burner and wipe on a thin layer of oil. Following these steps keeps the seasoning in good shape and the pan ready for its next use. For more on keeping your pan in top condition, see How to Clean a Cast Iron Skillet: 5 Steps That Protect the Seasoning and How to Season Cast Iron Skillet: 6 Steps for a Slick, Durable Pan.

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Emily Parker

About Emily Parker

Emily Parker is part of our editorial team and reviews and edits our cookware & knives guides, checking product details against manufacturer specifications and owner feedback.