How to Deep Clean Cast Iron and Finally Get That Layer of Rust Off

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Give your cast iron cookware a showroom shine with simple items you already have at home.

A cast iron pan can quickly become rusty and accumulate rust if it's not regularly used and maintained. Typically, the reason for a rusty cast iron pan is a combination of high moisture levels and a lack of built-up seasoning on the pan.

You can restore your rusty cast iron to like-new condition with some effort and a few common household items. Discover how to clean rust off cast iron using these effective methods.

Method 1: Scour with Steel Wool

This technique serves as the initial line of defense when you notice rust beginning to form on your cast iron skillet.

1. Scrub off the rust with steel wool.
2. Wash the pan in hot water mixed with soap.
3. Wipe down the pan completely with a lint-free cloth.
4. Re-season the cast iron.

Tip

If you don't have steel wool available, aluminum foil is a suitable alternative.

After the cast iron piece has been seasoned, store it properly to maintain the non-stick surface. Avoid using abrasive cleaners or scouring pads, as these can damage the seasoning.

After stripping off the rust to build up the pan’s protective layer, apply a skinny layer of cooking oil to your cast iron using a paper towel, and then bake the pan upside down in an oven at 350 degrees Fahrenheit for one hour.

If you have very stubborn areas of rust on your cast iron, try one of the techniques below to help break down the rust.

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Method 2: Soak in Vinegar

1. and warm water.
2. Submerge the cast iron in the vinegar solution for 30-60 minutes, or until the rust begins to peel off.
3. Wash the pan off in the vinegar solution and scrape off the rust areas with steel wool until they're gone.
4. Thoroughly wash the pan with water and dry it with a lint-free towel.
5. Re-season the pan.

Tip

Even though it's generally recommended to avoid soaking a cast iron pan, a short time in a mixture of water and vinegar is harmless, as it removes any rust and seasoning buildup completely. Just make sure to re-season the pan afterwards to restore its protective layer.

Method 3: Create a Baking Soda Paste

1. To make the recipe, combine cornstarch and water to form a paste.
2. Apply the paste to the rusty areas of the pan. Use steel wool or a cast-iron brush to scrub them clean.
3. Wash the cast iron with water to remove the baking soda and then dry it thoroughly using a lint-free cloth.
4. Re-season the pan.

3. Next, scrub the area with a wire brush to remove the loosened rust and debris.

1. Add 2 to 3 tablespoons of coarse kosher salt to your cast iron.
2. Gently buff the pan with salt in a circular motion using a damp paper towel, a cut potato, or a lemon half. Be sure to apply a bit extra force to any rust spots. Add more salt as needed and scrub until all rust is completely removed.
3. Wash the pan thoroughly with water, and dry it with a lint-free cloth.
4. Re-season the pan.

Tip

Be sure to use coarse salt for this process, not fine table salt. Only coarse salt is gritty enough to break through and eliminate rust.

What not to do when cleaning cast iron: do not put your cast iron in the dishwasher, as high heat can strip away the seasoning.

To keep your cast iron cookware in good condition, clean it right away and properly after every use.

1. While the pan is still warm, use a paper towel to wipe out the food bits. If any food is stuck, start by running some medium heat with some room temperature water over the stove to loosen it up.
2. Wipe with a cloth, warm water, and a small amount of dish soap.
3. Wash with warm water and dry completely with a soft, lint-free cloth.

By following these tips, you can keep your cast iron from rusting and ensure it stays in good condition for years to come.

To prevent rust on your cast iron cookware, it's easier to prevent it in the first place. Here are some tips to help keep your cast iron in prime condition:

• Limit water exposure to your pan as much as possible.
• Wash immediately after use and be careful not to use too much dish soap when washing.
• After washing, clean the pan with a lint-free cloth. You can also place the pan over the stove on low heat for a few minutes to remove any remaining moisture.
• Once the pan is dry, put a thin coating of cooking oil on the pan. This helps build up protective layers of seasoning to prevent the pan from rusting.
• Some highly acidic foods, like tomatoes or vinegar can damage your skillet's seasoning. It's best to use a pan that is well-coated with multiple layers of seasoning before cooking recipes with acidic ingredients.
• The more you use your cast iron cookware, the better it will perform. Cooking with it frequently helps maintain a protective coating layer and also prevents rust from forming.
• Try not to store your cast iron in areas with a lot of moisture, like the basement.

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