How To Clean A Cast Iron Skillet: 3 Easy Methods Without Ruining The Seasoning

Cleaning your cast iron skillet doesn’t have to be complicated. But cleaning it incorrectly can damage the seasoning that makes cast iron such a joy to cook with.

In this guide, I’ll walk you through three simple methods to clean cast iron safely without stripping the seasoning or causing rust.

Quick Answer: How To Clean A Cast Iron Skillet Correctly

1. Let it cool slightly (never rinse a screaming hot pan with cold water).
2. Rinse with hot water and scrub gently using a stiff brush or chainmail scrubber.
3. Dry completely, then apply a thin coat of oil to protect the seasoning.

Avoid soaking, harsh detergents, sanding, or putting it in the dishwasher. When cleaned and dried properly, cast iron will not lose its seasoning or develop rust.

That’s it. No sanding. No soaking. No panic.

Most of the time, cleaning cast iron is far less dramatic than people make it. You don’t need sandpaper. You don’t need grinders. You don’t need to strip it down to bare metal every time something sticks. Proper cleaning is about consistency, not aggression.

Why Proper Cleaning Matters

What attracts most of us about cast iron skillets and other pieces of cast iron cookware is their durability, even heat distribution, and natural non-stick surface.

But for this to happen successfully, they require special care. Unlike other cookware, like Teflon-coated non-stick pans, stainless steel, or aluminum, cast iron relies on a layer of polymerized oil called “seasoning.” This bonded layer does two things:

1. It helps to prevent rust from forming and potentially damaging the entire piece of cast iron and
2. It helps to seal any imperfections and unevenness from the manufacturer’s molding process, which results in creating a natural, non-stick, slick cooking surface.

Improper cleaning methods and techniques, such as sanding and grinding, using chemical-based cleaners, harsh detergents, or soaking in water for extended periods, can strip this seasoning, leaving your skillet vulnerable to food sticking at best and to rusting and pitting at worst.

Before you take sandpaper or a grinder to a skillet, here’s my take on it: Should You Polish Cast Iron?

It doesn’t have to be all bad news, though; the good news is that with a few simple techniques that we will explain in full detail below, you can clean your cast iron skillet safely, without worry, while preserving its protective coating, which we refer to as, and is commonly called, “seasoning.”

Tools You’ll Need

Before we get into how to clean and season a cast iron skillet, there are a few simple tools and items that are handy to use, so let’s gather these first. If you don’t have them all, that’s okay, too.

• A stiff-bristle brush and warm water help remove any loose food particles, and a stainless steel chainmail scrubber works so easily, too, without damaging the cast iron, especially on light carbon build-up.
• Plastic scrapers help to loosen stuck-on food particles once they are soaked and softened.
• A soft towel, paper towel, or T-shirt works great for drying, too.
• Quality oils (Crisco, grapeseed, lard, and avocado oil) are good options for re-seasoning.
• Kosher salt, sea salt, or table salt works wonders as a light abrasive when added to oil to make a salt/oil paste. This is my favorite way to clean burnt-on food and carbon buildup, as you will see in the following video.

How To Clean A Cast Iron Skillet: 3 Easy Methods

Clean Right After Cooking

The easiest way to keep your skillet clean is to rinse it immediately after use.

1. Let the skillet cool slightly: Avoid thermal shock by not rinsing a screaming hot skillet with cold water.
2. Rinse with hot water: This helps prevent cracking or warping. You never want to add cold water to a hot skillet!
3. Scrub with a stiff brush: Gently remove food particles without scratching the seasoning.
4. Dry thoroughly: Towel-dry, then place the skillet on low heat to evaporate any remaining moisture.
5. Apply a light coat of oil: Wipe a thin layer of oil all over the surface to maintain the existing seasoning and prevent rust from forming.

Pro Tip: Cleaning while the skillet is warm makes it easier to remove food particles, but be careful not to burn yourself!

Boil Away Stubborn Food

For stuck-on food that won’t come off with a simple scrub, boiling water in the skillet is your next best option. If you are not able to clean it immediately after cooking, this method is very easy to do on the stovetop.

1. Scrape off what you can: Use a plastic scraper or a wooden spatula to remove all loose food bits before adding any water.
2. Add water and heat: Pour a small amount of water into the skillet and place it on the stovetop. As it heats up, the water will loosen the stuck-on residue.
3. Scrape as it boils: Use a wooden or metal spatula to scrape off food particles as the water boils. (Yes, metal is okay as long as you are not excessively scraping or gouging into the cast iron).
4. Rinse and dry: Once the food particles are loosened, drain the water, rinse with hot water, and use the stiff-bristled brush again to remove any remaining bits, then dry the cast iron skillet thoroughly.
5. Re-season: Once it is clean and dry, add a thin coat of oil and heat the skillet to ensure it’s protected. Always wipe out any excess oil.

Pro Tip: This method is excellent for cleaning dried-on gravy, sticky sauces, or stuck-on eggs left on the skillet.

Salt and Oil Scrub

This is by far my favorite method for cleaning those stubborn carbon buildups and impurities caused by burnt-on food particles that seem impossible to remove.

I highly recommend you try this method, not as a last resort, but because it is beneficial every time you clean and season your cast iron skillet.

1. Heat the cast iron skillet: Place the skillet on the burner and heat.
2. Add oil and salt: As it heats up, add a couple of tablespoons of oil and a handful of kosher salt to the pan. You’ll need enough salt to mix with the oil to make a thick paste.
3. Scrub with a paper towel: Take a couple of paper towels and wipe the paste all over the inside of the skillet. The salt acts as a gentle abrasive, lifting and removing food particles and impurities without damaging the seasoning.
4. Rinse thoroughly: Rinse out the salt and oil mixture with hot water.
5. Dry and re-season: Dry the skillet and apply a thin layer of oil to protect it before storing it away until your next use.

Pro Tip: This salt scrub method pulls out impurities while the oil in the paste adds to the seasoning layer.

Common Mistakes to Avoid

• Using soap excessively: Mild detergents like Dawn are okay, but avoid harsh chemical cleaners.
• Soaking the skillet in water: Extended soaking leads to rust. Never put cast iron in the dishwasher!
• Skipping the drying step: Even small amounts of moisture can cause rust, so be sure to dry completely.

FAQs About Cleaning Cast Iron Skillets

For more questions about how to care for your cast iron, check out our frequently asked questions article.

My Simple Daily Cleaning Routine

If you just want the easiest long-term approach:

• Rinse with hot water while the skillet is still warm.
• Scrub lightly.
• Dry fully on low heat.
• Wipe on a thin coat of oil and wipe most of it back off.

That’s it. No sanding. No grinding. No panic.

How To Maintain Your Cast Iron Skillet

• Clean after each use: Rinse and scrub with hot water.
• Dry thoroughly: Moisture is the enemy of cast iron.
• Season regularly: Apply a light coat of oil after cleaning to maintain the seasoning. This can easily be done on your stovetop.
• Store in a dry place: Never put your cast iron away wet or moist. Moisture will cause your skillet to rust.

Conclusion

Is cast iron worth it? Cleaning a cast iron skillet doesn’t have to be complicated. With these three methods—quick cleaning, boiling stuck-on food, and using a salt scrub—you can easily maintain your skillet without ruining its seasoning. Proper cleaning and care will ensure your cast iron remains a versatile and cherished piece of cookware for many years to come.