Emily ParkerBy Emily Parker

Updated November 2026

Learning how to wash and season a cast iron skillet takes about 20 minutes of active work and an hour in the oven. When you finish, your pan will release food more easily, resist rust, and develop a dark, slick surface that improves with every use. The method below covers gentle cleaning, drying, and building a thin layer of baked-on oil.

Step 1: Clean the Skillet Without Stripping It

Wash the pan while it is still warm, not hot, so water does not flash to steam and invite rust. Use hot water, a soft sponge or brush, and a small drop of mild dish soap. Modern dish soap will not destroy a well-built seasoning layer, despite the old advice to avoid it entirely. For stubborn residue, scrub with coarse kosher salt and a paper towel instead of steel wool.

Shopping for one? See our guide: 7 Best Flaxseed Oils to Season Cast Iron Skillets with Flaxseed Oil (2026).

Step 2: Dry Completely

Rinse the pan and dry it right away with a towel. Then set it over low heat for two to three minutes until every trace of moisture is gone. Water left in the pores or on the cooking surface is the most common cause of surface rust.

Step 3: Apply a Thin Layer of Oil

While the pan is still warm, add about a teaspoon of a high smoke-point oil such as flaxseed, grapeseed, or refined canola. Rub it across the entire pan, including the handle and the underside, then wipe off as much as you can with a clean paper towel. The surface should look almost dry. A thick coat will turn sticky instead of hard.

Step 4: Bake the Seasoning Into the Metal

  1. Preheat your oven to 450°F (230°C).
  2. Place the skillet upside down on the middle rack. Put a sheet of foil or a baking tray on the rack below to catch drips.
  3. Bake for one hour, then turn off the oven and let the pan cool inside.

Repeat the oiling and baking steps two or three times for a sturdier base layer. Each thin coat bonds to the one before it, and the surface darkens with every pass.

Quick Reference Checklist

  • Mild dish soap, hot water, and a soft brush or sponge
  • Kosher salt for stuck-on bits
  • Clean towel and paper towels
  • Stovetop burner for drying
  • Oven-safe baking tray or foil
  • High smoke-point oil, such as flaxseed or grapeseed

Common Mistakes to Avoid

  • Soaking the pan. Long soaks invite rust, especially around the rivets and handle.
  • Leaving it wet. Always finish with a heat-dry step.
  • Applying too much oil. Excess oil pools and bakes into a gummy, uneven finish.
  • Skipping the foil. Drips can smoke heavily and ruin the oven floor.
  • Cooking acidic food too early. Tomato sauce and vinegar can strip fresh seasoning, so wait until the layer has built up.

A stiff nylon brush helps you scrub without scratching the surface, which matters when you clean the pan often. View on Amazon

Flaxseed oil is a popular choice for seasoning because it polymerizes into a hard, durable layer. View on Amazon

A small cast iron scraper makes it easier to remove baked-on food before washing. View on Amazon

FAQ

Can I use dish soap on cast iron?

Yes. A small amount of mild dish soap will not remove a properly built seasoning layer. Rinse well and dry the pan immediately afterward.

How often should I season my skillet?

Re-season whenever the surface looks dull or dry, or when you notice light rust spots. Regular cooking with fats also keeps the layer in good shape between full seasonings.

Why is my seasoning sticky?

Sticky seasoning usually means too much oil was left on the pan before baking. Wipe the skillet thoroughly next time and bake a thinner coat.

Conclusion

Washing and seasoning a cast iron skillet is a short routine once you know the steps. Clean gently, dry fully, apply a thin layer of oil, and bake it on. Repeat as needed, and the pan will reward you with better cooking and fewer headaches. For broader guidance, see How to Season Cast Iron: A Step-by-Step Guide for Beginners and How to Clean a Cast Iron Skillet: 5 Steps That Protect the Seasoning.

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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.