NEVER allow cast iron to air-dry as this can allow rust to build. This is particularly important if you have just used soap. Remoisturizing your skillet with oil will be crucial in the next step. Heat it up: Place your clean cast iron skillet over low heat for 5-10 minutes.
Dry thoroughly right after you clean—do not let your cast iron air dry. Set on the stove over medium heat to evaporate any remaining water. Rub with a thin coat of vegetable oil (about a ½ teaspoon for a 10 inch skillet) until evenly coated and shiny. Let cool completely and store in a dry place.
Wash the pan with hot water and dish soap. Thoroughly dry the pan. Place pan in the oven for 10 minutes to open up the iron and make sure it is completely dry.
Clean the pan just after use, while it is still warm or hot. Avoid placing the pan into the sink or letting it soak, as this may also cause rust to start to form. 2. Wash the skillet using warm water and a stiff brush or sponge.
To clean, just use mild dish soap (that's right, it's okay to use a little soap!) and a scouring pad or a cast iron pan cleaning brush. Wash it, scrub it, rinse it, then wipe it out well and season it with a few drops of oil and store with a paper towel covering the cooking surface.
Everyday cleaning
Be sure to let the cast iron cool first to avoid damage from thermal shock, which could warp or crack either the pot or the enamel. For everyday cleaning, use a non-abrasive sponge such as a Dobie sponge with hot water and regular dish soap.
Cooks for generations didn't use soap on cast iron pans because the soaps were made with lye and vinegar, two ingredients that will absolutely strip seasoning and can even damange the pan's iron. Today's aerosol oven cleaners are often made with lye, or sodium hydroxide.
Too much oil baked into the cast iron will cause it to polymerize unevenly and eventually will cause the surface of the skillet to flake. Adding too much oil when seasoning will also cause your pan to become sticky, notes Lodge.
You may still have a little food crusted on after using it, which is normal and it should wash out easily. But if you start to notice food constantly sticking, it's time to season your skillet again. Or, if you notice a bit of rust, it's definitely time to season.
The answer is yes! Using olive oil to season your cast iron skillet is a simple and effective way to season your pan.
Heat in the oven.
The high heat allows the oil to break down and bond with the cast iron. If your oven isn't hot enough, the oil won't break down and your skillet will come out sticky. This process takes about one hour. After that hour is up, turn off your oven and let the skillet cool off in there.
Start the process soon after cooking to prevent any food remnants from getting stuck as the pan cools. While your pan is still warm, take it to the sink and wash it with a drop of dish soap. (Yes, despite popular belief, a little soap is fine if you remember to re-season your cast-iron skillet as needed.
To clean a cast iron skillet, wait for it to cool down and then run hot water over it in the sink. Do not let the pan soak in water. If immersed in water for too long, cast iron will rust. It's up for debate whether to use soap when cleaning.
How often to clean a cast iron is dependent on how dirty your skillet is. If it's only lightly soiled, then a quick wipe down or a quick wash with soap and water after use is plenty. If it's a little dirtier, or there's a little food stuck on then you may need to scrub a bit with some salt.
Cast Iron Skillet Cleaning Method: Salt and Paper Towel
The method: Pour 1 cup coarse kosher salt into the still-warm skillet. Use a folded kitchen towel to scour. Discard the salt and rinse the skillet with hot water.
Truthfully, leaving your cast iron to soak in the sink is worse for it than any tomato sauce or soap will every be. Cast iron is porous, meaning that long exposure to water can cause it to soak up the moisture and eventually rust.
Acidic foods (unless you make it snappy)
Acidic foods (like tomato sauce, wine-braised meats, etc.) enter the red zone when they spend too much time cooking in the skillet. It's particularly important to not marinate anything in a cast-iron pan, as many marinades are quite acidic in order to tenderize the meat.
A well-seasoned skillet will have a dark, semiglossy finish and won't be sticky or greasy to the touch. It won't have any rust or any dull or dry patches. An easy way to test a skillet's seasoning is to fry an egg (heat 1 tablespoon vegetable oil in skillet over medium heat for 3 minutes, then add egg).
The thick gauge of the cast iron takes some time to heat thoroughly and will retain its heat for a long time. Before you start cooking, make sure to preheat your cast iron pan over medium-high heat. Any higher and you risk shocking the metal and burning the food. Any lower, and you'll be waiting around forever.
Speaking from Stahl's experience as a medical graduate, he says not cleaning a cast-iron pan probably won't make you sick. That's because cooking generally requires temperatures too high for illness-inducing bacteria to survive.