One overlooked corner, and suddenly your trusty cast iron skillet looks like it’s been through a rough sea. Rust is alarming, but it’s not the end of the road—it happens when the seasoning (the thin, slick layer of baked-on oil that keeps the pan naturally nonstick) wears away and iron meets moisture and oxygen. The good news: you can clean rust off cast iron at home with common pantry items and a little patience, and the process will leave your pan ready for decades more service.
What You’ll Need
- Fine steel wool (grade 0 or 1)
- Scouring pad or nylon brush
- Mild dish soap
- White vinegar
- Baking soda
- Clean cloths or paper towels
- Neutral oil, such as vegetable or flaxseed oil
- Aluminum foil
How to Remove the Rust
- Scrub off loose rust. In the sink, hold the pan under warm running water and work the fine steel wool in circles over the rusty parts. A few drops of dish soap help lift old grease and debris. You don’t need to make it shine; just loosen what’s flaky and rough. Rinse and dry briefly.
- Soak stubborn spots. For rust that doesn’t budge, mix equal parts white vinegar and water in a container large enough to fit the pan. Soak for 15 to 30 minutes, checking every 10 minutes. Vinegar lifts rust effectively, but it’s an acid and can begin to etch the iron if left too long, so set a timer.
- Scrub again, using baking soda if needed. After the vinegar soak, the rust should be soft. Work it off with the scouring pad. Any small holdouts can be treated with a paste of 3 parts baking soda and 1 part water; rub gently, rinse, and dry.
- Dry the pan completely. Towels miss the water hiding in the iron’s tiny pores, so set the skillet on a burner over low heat for about three minutes until any remaining moisture steams away.
- Oil the pan lightly. Pour about a teaspoon of neutral oil into the warm, dry skillet. Use a paper towel to spread it over the entire surface, including the handle and sides. Then wipe it off with a clean cloth. A very thin, almost dry sheen is exactly what you want; too much oil will bake into a sticky surface.
- Season in the oven. Place the oiled skillet upside down on the middle rack of a cold oven. Set the temperature to 350°F and put a sheet of aluminum foil on the lower rack to catch any drips. Bake for one hour, then turn off the heat and let the pan cool inside with the door closed. It won’t look brand-new, but it should have a smooth, matte finish.
💡 Note: Skip olive oil for seasoning. It has a lower smoke point and may leave the pan tacky. Refined flaxseed or regular vegetable oil are more reliable choices.
That’s all there is to it. Once your skillet is re-seasoned, it will resist rust and keep building that nonstick patina with each meal. The only real rule from here: never put it away wet. A few extra minutes of care now means your cast iron will stay a favorite in your kitchen for a long, long time.