11 Mistakes That Are Ruining Your Cast Iron Cookware

Cast iron cookware often feels like a kitchen superhero: durable, versatile, and capable of creating dishes that taste like they’ve been kissed by culinary magic. But as tough as cast iron is, it isn’t indestructible. If you’ve noticed your trusty skillet doesn’t perform like it used to or has started showing signs of wear, there’s a good chance some common mistakes are to blame. Let’s break down those missteps so you can keep your cast iron cookware in top-notch condition.

Mistake 1: Skipping or Mishandling the Seasoning Process

Seasoning is the foundation of a well-maintained cast iron skillet, and skipping it—or doing it poorly—is one of the quickest ways to ruin your pan. Cast iron is naturally porous, and seasoning fills those pores, creating a slick, non-stick surface. Even if your skillet comes pre-seasoned, giving it a fresh layer of oil and heat is a good idea.

The stovetop method is particularly effective. Apply a thin layer of oil, wipe off the excess, and heat it until it smokes slightly. Repeat this a few times, and you’ll notice your skillet developing that glossy patina. Avoid using too much oil during the process—it can leave sticky residue instead of the smooth finish you’re aiming for.

Mistake 2: Cooking Acidic Foods Too Soon

Tomato-based sauces, citrus-heavy marinades, and vinegar-laden dishes might sound like excellent ideas, but they can wreak havoc on poorly seasoned cast iron. The acidity in these ingredients can strip the seasoning layer, leaving your skillet vulnerable to rust and imparting a metallic taste to your food.

While a well-seasoned pan can handle occasional exposure to acidic foods, it’s best to steer clear until your skillet has built up a robust seasoning. If you’re craving a long-simmered tomato sauce, opt for an enameled cast iron pot instead—it’s designed for these situations.

Mistake 3: Neglecting Proper Cleaning Techniques

Cleaning cast iron improperly is a recipe for disaster. Tossing it in the dishwasher or leaving it to soak in the sink can strip away seasoning and invite rust. The dishwasher’s harsh detergents and prolonged water exposure are a nightmare for cast iron.

Instead, clean your skillet while it’s still warm. A small amount of water and a gentle scrubber are usually enough to remove food particles. For stubborn residue, try a sprinkle of kosher salt and a paper towel—it’s abrasive enough to lift debris without damaging the seasoning. Always dry your skillet thoroughly after washing, either with a towel or by placing it on a stovetop burner to evaporate any remaining moisture.

Mistake 4: Storing It While Damp

Even a few drops of water left on your skillet can lead to rust. This is one of the most common—and most avoidable—mistakes. After cleaning, dry your skillet completely and, for added protection, rub a light layer of oil over the surface.

Storage matters too. Avoid stacking your skillet with other pans unless you separate them with paper towels to prevent scratching. Better yet, hang your cast iron cookware where air can circulate freely, reducing the risk of trapped moisture.

Mistake 5: Using the Wrong Cooking Utensils

While cast iron is known for its durability, your choice of utensils can still make a difference. Metal spatulas, for example, are excellent for scraping and smoothing the surface, but rough or overly aggressive use can cause issues, especially in newer pans.

For beginners, softer utensils like silicone or wood can help you maintain control without risking damage to the seasoning. Once your skillet is well-seasoned, metal tools are less likely to cause harm and can even help refine the surface over time.

Mistake 6: Applying Cooking Sprays

Reaching for non-stick sprays like Pam might seem convenient, but these products often contain additives that can gunk up your skillet’s surface. Over time, these residues build up, creating a sticky layer that’s a pain to remove.

Stick to simple fats like vegetable oil, canola oil, or even lard when cooking or seasoning your cast iron. These oils are more reliable and won’t leave behind unwanted buildup.

Mistake 7: Not Preheating the Skillet

Cast iron takes time to heat up, but skipping the preheating step can lead to uneven cooking and food that sticks to the surface. The beauty of cast iron lies in its ability to hold heat, but it needs a few minutes to get there.

Set your skillet over low heat first, then gradually increase to your desired cooking temperature. You’ll end up with evenly cooked food and a better sear—perfect for those steak nights.

Mistake 8: Forgetting to Use It Regularly

A cast iron skillet thrives on use. Cooking with it often allows oils to build up, reinforcing the seasoning and improving its performance over time. Letting your skillet sit unused for months, on the other hand, can cause the seasoning to degrade or dry out.

Incorporate your skillet into everyday meals, from frying eggs to roasting veggies. The more you use it, the better it becomes.

Mistake 9: Overloading It with Food

While cast iron can handle heavy-duty tasks, overloading it with too much food can cause uneven cooking and make it harder to achieve that perfect sear. Crowding the skillet lowers the overall temperature, which means your food ends up steaming instead of browning.

Cook in smaller batches to maintain the skillet’s heat and ensure each piece gets the attention it deserves.

Mistake 10: Ignoring Rust

Rust doesn’t mean the end of your skillet, but ignoring it can. Even small spots can spread if left untreated. The good news is that rust can usually be scrubbed away with a bit of steel wool or a stiff brush. Once it’s clean, re-season the skillet to restore its protective layer.

Mistake 11: Storing Food in the Skillet

Leaving leftovers in your skillet might seem like a good idea, but it’s a big no-no. The moisture from the food can break down the seasoning and lead to rust. Additionally, certain foods can absorb excess iron from the skillet, which isn’t ideal for everyone, especially those with conditions like hemochromatosis.

Transfer your food to proper storage containers after cooking, and clean your skillet promptly to keep it in excellent shape.

Cast iron cookware is one of the most rewarding tools you can own in the kitchen, but it requires care and attention to live up to its potential. By avoiding these common mistakes, you’ll extend the life of your skillet and enjoy years of flavorful, perfectly cooked meals. Treat it well, and your cast iron will serve you faithfully for generations.