Clean it, don't clean it, oil it, salt it, water it, "season it", season it by not cleaning it so your french toast gets all that good hamburger flavor from the night before...

I've read so many different ways to treat cast iron that at this point I'm convinced that it's all just superstition.

For those who don't know, you can wash cast iron with modern detergents, and as long as you dry it properly you won't have any problems.

It used to be that dish detergents contained lye that would strip the seasoning off of cast iron cookware.

If you use regular dish soap (i.e. dawn), you most certainly can (and should) wash it. However, the trick is that you absolutely must dry it, put a light coat of oil, and then bake it to keep it from rusting. I preheat the oven to 450°F and then turn off the oven, and let the pan sit until it’s cool enough to the touch to put away.

I had a roommate that did this. Except their reason for not cleaning it was that they thought all that stuff leftover was what is called seasoning. AND they wanted the cast iron seasoning to flavor their dishes.

I tried to gently explain the misconceptions, but they believed their grandma instead of me.

Honestly, depending on the specifics here, not the worst. If they're using an oil that will polymerize, then as they oil/heat/cool cycle it, the seasoning will further develop over time, as long as they're somewhat scraping off remnants of their cooking as they finish, leaving it as clean as it can be without actually washing it, and then heat cycling it to sanitize any bacteria that might be there, I don't really see a problem with it....

It's not exactly up to modern hygienic standards, or social standards.... And I'm pretty sure if any restaurant or food joint did the same they would get shut down by the health inspector before long.... But you do you buddy.

For anyone not in the know, the thing with cast iron and cleaning is no longer a problem. Clean your cast iron. When cast iron was just about the only cookware, soaps included lye. Lye will erode the non-stick "seasoning" on cast iron. Modern soaps do not contain lye, so go ham.

Cleaning, however, introduces water.... And water causes iron to rust, so it is generally advisable to clean your cast iron cookware, then immediately heat it up past the boiling point for water, to vaporize any liquid water and carry it off the surface of the iron. Once past that temperature, let the cookware cool, then treat it with a thin layer of oil. This will protect the surface from atmospheric moisture and allow the cookware to work over much longer periods of time without needing to be "re-seasoned" (which is removing the layers of polymerized oil on the cast iron, and then re-applying it using a slow method of oiling, then heating the cookware, allowing it to cool, oiling then heating again)...

Don't be afraid of cast iron, it needs a little more attention than other cookware, but it's a joy to actually cook with.

Afer work, I once made dinner for my housemates. After the meal, one of the housemates was like: "if you cooked, you gotta wash the dishes!" ok, so I washed the dishes. After the dishes, the housemate was like: "If you used the cast-iron pan, you have to 'season' it with oil!" and I was like: wtf I worked all day, I cooked, I did the dishes, now I have to cook again just to make the pan happy?!? So I never used a cast-iron pan again.

Just leave it on the stove on maximum heat for one hour after each use, then chip off the carbonized chunks of asphalt that you've just created. 100% sterilized, no washing required, and smells just like your big bad diesel pickup exhaust.

Any pathogens would be cooked anyway.

Yall need the The Food Lab better cooking with science book by J. Kenji Lopez-Alt. He has a whole section on proper cleaning and seasoning of a cast iron skillet.

So if you just wiped it out with a paper towel, how many years do you think one could go before getting actually sick? I'll volunteer to be a test subject if I find a cheap cast iron. Apparently I'm supposed to get away from my non stick pans anyways

99% of all the old "don't wash cast iron!" shit you hear is antiquated information from back in the day when they used lye for soap.

There is absolutely no reason today to not wash your cast iron today. That doesnt mean you always have to, though. Often just wiping it out with a damp rag is more than enough, and if you have a lot of really stuck on shit.. You can scrub it with a slurry made up of salt, water, and soap (Make sure you use little water so the salt doesnt dissolve into the water and disappear). The salt will provide some abrasive scrubbing without damaging the cure.

outside of that, again, if you choose to, you can absolutely wash it. Warm water and soap, dry it off, put it on a hot burner for a bit to dry off any remaining water.. and if you are using it again tomorrow, you're done. If you're not gonna use it for a while, then a very very light coat of oil would be wise until you use it next time.

and just in case anyone wants a good way to cure.. I cover my cast iron in a thin layer of lard, and put it on a rocket hot grill, and leave it until it stops smoking. then i take it off, let it sit until i can handle it again.. put another coat of lard on, and repeat. a couple coats should give you a great starting base to build your cure up from.. and its not something you have to do often unless you really abuse your cast iron.