For a small amount of rust, just scour it with a scrubber and water like normal and rub with oil. But if you've got a bigger problem, luckily, a little white vinegar and elbow grease are usually enough to whip that pan back into shape.
The vinegar solution will dissolve the rust, but once that's gone, it can penetrate further and start eating away at the original cast surface of the pan, the ultimate death sentence for your skillet. If that happens, retire it to a piece of farmhouse-chic kitchen decor.
What is the best cleaning solution for cast iron? Water! You don't need (and should not use) soap to clean a cast iron. Simply use water and a scrub brush, or for a big mess use some course salt and oil to scrub away to residue and then rinse with water.
You should absolutely clean cast iron cookware. Just don't use anything abrasive like steel wool. Also don't soak for very long. And use a standard dish detergent like Dawn. The notion of not cleaning is decades outdated and comes from when soaps were lye-based (lye will break down the seasoning).
Do not use steam iron cleaners or other fluids like vinegar as such solutions may damage the iron interior.
Common cooking oils like olive oil will gradually produce seasoning, but won't be as effective as grapeseed oil. Canola, other vegetable oils, and shortening are a little better.
Acid Foods
Any acid substance, including vinegar, citric acid and vitamin C (ascorbic acid) can enhance iron absorption from sources of inorganic iron (the form of iron found in pills or plants, like ferrous sulfate.)
Will Soap Ruin Cast Iron? Using soap will not ruin your pan. It is totally fine on enameled cast iron, and on plain cast iron, too. It's not going to destroy your seasoning.
Clean your cast-iron skillet each time you use it. Doing so prevents stuck-on food from staying on the skillet between uses. If the skillet is only slightly dirty, a quick wipe after cooking in it will work. If dirtier, or food is stuck, then scrubbing it is best.
Copenhaver notes that a well-seasoned cast-iron pan is extremely durable and can handle reasonable amounts of acidic cooking without noticeable change, but prolonged exposure can do some damage to a seasoning layer. The most common acidic food you might not want to cook in your cast-iron skillet is tomatoes.
You let your skillet soak.
Soaking your cast iron skillet in your sink is a recipe for rust, as is washing it in the dishwasher. Instead, clean it ASAP, even using simple soap and water if you must.
You should only need to fully re-season your cast-iron cookware one to two times a year, but you may also want to give it some extra seasoning love anytime you cook something that requires a heavy-duty cleaning.
When you soak the steel wool in vinegar it removes the protective coating of the steel wool and allows the iron in the steel to rust. Rusting (or oxidation) is a chemical reaction between iron and oxygen, this chemical reaction creates heat energy which increases the temperature inside the beaker.
The answer is that vinegar will not harm your pipes if used in small doses as recommended in many of the recipes that you find online. No matter what your pipes are made of, pex, pvc, copper, etc. Vinegar will not harm your water pipes.
Working vinegar into your culinary toolkit is an excellent way to add a punch of flavor and personality to a host of dishes, especially salad dressings, marinades, chutneys, sauces and soups. At the same time, vinegar may be good for your health, possibly helping to control blood sugar and lower cholesterol.
Since olive oil is such a pantry staple, many people naturally wonder if they can use olive oil to season cast iron. You can use olive oil to season cast iron, but you need to choose a high quality extra virgin olive oil, which should have a smoke point close to 400 degrees Fahrenheit.
Cast iron is a big hunk of iron, after all. Too much exposure to water will cause it to rust. You can still salvage a rusted pan by scrubbing and re-seasoning it, but it's more of a pain than just wiping the skillet dry every time you use it.
Yes, you can absolutely use soap on cast iron.
Add hot water: Wash the skillet by hand using hot water and a sponge or stiff brush (here's our favorite brush, which is designed specifically for cast-iron). Avoid using the dishwasher, soap, or steel wool, as these may strip the pan's seasoning. Make sure to use tongs or wear gloves if the water is extra hot!
How to deep clean your iron. Most steam irons now have some form of self-cleaning, or 'anti-calc' system – use these regularly following the manufacturer's instructions. Alternatively, pour equal parts distilled white vinegar and water into the water reservoir until it's a third full.