Preheat cast iron slowly and add oil before food.
- Season in thin layers; use flaxseed or vegetable oil.
- Clean with hot water and dry, then oil lightly.
- Avoid acidic foods to protect seasoning.
- Replace only if cracked or warped, not for rust.
Why does food stick to cast iron?
Sticking happens when the pan's surface isn't smooth or properly seasoned. Seasoning is polymerized oil that creates a non-stick layer. If the layer is thin or damaged, food grabs onto bare iron. Cooking at too high heat can burn food onto the surface. Using too little oil or fat also causes sticking. Acidic foods like tomatoes can strip seasoning, exposing the iron. Moisture in food can steam and lift it from the pan before browning.
How to fix a sticky cast iron skillet
First, scrub the pan with coarse salt and a little oil to remove stuck bits. Rinse with hot water and dry thoroughly. Apply a very thin layer of vegetable oil or flaxseed oil to the entire surface. Heat the pan upside down in an oven at 375°F for one hour. Let it cool slowly inside the oven. Repeat this seasoning process two or three times for a better layer. For immediate cooking, preheat the pan on low for five minutes, then add oil before food.
How to prevent food from sticking in the future
Always preheat your cast iron slowly on low or medium heat. A hot pan ensures food releases easily. Add oil or fat just before adding food, not while the pan is cold. Use enough oil to coat the bottom, but not so much that it pools. Cook foods that are dry or starchy with extra fat. Avoid cooking acidic foods frequently, as they break down seasoning. After each use, clean with hot water and a stiff brush, then dry and lightly oil.
When should you replace or reseason your cast iron?
You don't usually need to replace cast iron; it can last generations. If the surface is badly rusted or pitted, you may need to strip and reseason. Rust shows as orange flakes and a rough texture. To strip, scrub with steel wool and vinegar, then reseason. If the pan is warped or cracked, replace it, as it won't heat evenly. Most sticking issues are fixed with proper seasoning, not replacement.