Back in 1896, when Griswold was stamping out cast iron skillets in Erie, Pennsylvania, nobody was Googling how to clean them. You just… did it. Your grandmother knew, her mother knew, and the pan got passed down with a few decades of built-up seasoning and zero existential anxiety. Fast forward to now, and we’ve somehow turned cast iron care into something that feels one step removed from defusing a bomb. The internet is packed with conflicting advice, sacred rules, and dire warnings about ruining your pan forever. Most of it? Overblown. But some of the mistakes people keep making are very real — and very fixable.
The soap myth
This one has been floating around for decades, and it just will not die. The idea that you should never, ever use soap on cast iron. People repeat it with this reverence, like it was carved into a stone tablet. And honestly, I get where it came from — old-school lye-based soaps were harsh enough to strip seasoning right off the metal. But here’s the thing: you’re not scrubbing your skillet with homemade lye soap in 2025. The dish soap sitting next to your kitchen sink is mild. Really mild.
Jordan Burdey, founder of Cookware Care, puts it bluntly: “No amount of soap you can apply and scrub with will damage or harm the seasoning of your cast iron.” That’s a pretty definitive statement from someone whose whole business revolves around caring for cookware. The seasoning on your cast iron — that dark, smooth layer — is polymerized oil. It’s bonded to the metal at a molecular level. A squirt of Dawn isn’t undoing that. What will cause problems is never washing the thing at all, which brings us to the flip side of this myth.
If you skip washing because you’re afraid of soap, you end up with layers of carbon deposits building up over time. That gunk flakes into your food. It affects flavor. It looks gross. So yes — wash your cast iron after every single use. Soap, warm water, a sponge. Done. Your pan can handle it.
Moisture kills
So you’ve washed your pan. Great. Now here’s where a lot of people trip up — they leave it in the dish rack. Maybe on the counter with a little water pooled in the center. Maybe they stack it under another pan while it’s still damp. All bad moves. Cast iron and lingering moisture do not coexist peacefully.
James King, a cleaning expert and operations manager at DeluxeMaid, doesn’t mince words about it: “Moisture is basically the enemy of cast iron. If you stack or cover it, trapped water can’t evaporate. Once rust starts, it spreads quickly.” He recommends drying your pan immediately after washing. Every time. No exceptions. You can towel it off by hand, or — and this is what a lot of serious cast iron people do — stick it on a burner over low heat for a minute or two until any remaining moisture evaporates completely.
That brings up another thing worth mentioning: storage matters too. Keeping your cast iron in a humid cabinet under the sink? Not ideal. A damp basement shelf? Even worse. You want airflow. Dry conditions. If you’re stacking multiple pans, slip a paper towel between them. It’s a small step that prevents a lot of heartache later. Rust isn’t the end of the world — you can scrub it off — but why create extra work for yourself?
Don’t soak it
We all have that one pan sitting in the sink right now, soaking in gray water because we “don’t feel like dealing with it yet.” I’m not judging. But if that pan is cast iron, you need to go fish it out. Right now. Soaking is one of the worst things you can do. Extended exposure to water strips away seasoning, invites rust, and lets water creep into the microscopic pores in the metal. Even a short soak — like 20 or 30 minutes — can weaken that protective oil layer you’ve been carefully building up.
Along the same lines, your cast iron should never go in the dishwasher. I know someone out there has done it. The combination of prolonged water exposure, harsh detergent, and the high heat cycle is basically a seasoning demolition crew. You’ll pull it out looking like a different pan — and not in a good way. The dishwasher is for your Pyrex and your mismatched Tupperware lids. Cast iron gets the hand-wash treatment.
For stuck-on food — because yes, it happens even on well-seasoned pans — try adding a little water to the pan, putting it on the stove, and bringing it to a boil for a couple minutes. Then scrape with a pan scraper or metal spatula. That usually does it. If you’ve got something truly stubborn, a chain-mail scrubber or even steel wool will work. Just know you might need to re-season afterward, which — keep reading — isn’t as scary as it sounds.
Harsh chemicals are out
This one seems obvious, but it catches more people than you’d think. If you’re the type who keeps a bottle of heavy-duty degreaser or oven cleaner around (and who doesn’t?), you need to keep that stuff far away from your cast iron. Those cleaners are formulated to cut through serious buildup, which means they’ll absolutely wreck the seasoning on your skillet without blinking. Burdey specifically warns against using these types of products directly on cast iron.
But here’s a detail that’s easy to miss. Aerosol sprays. If you’re spraying down your stainless steel fridge or your oven while a cast iron pan is sitting on the stove nearby, those fine particles can drift and land on the cooking surface. That trace chemical residue isn’t something you want embedded in your seasoning — or your next batch of cornbread.
Burdey also raises a good point about sponges. Most of us use one sponge for everything — scrubbing the stovetop with a cleaning spray, then turning around and using the same sponge on a pan with just dish soap. Those sponges hold onto micro-traces of harsh cleaning agents. His recommendation? Keep a dedicated sponge just for your cast iron. Or at least one that only ever touches regular dish soap and water. It sounds like overkill until you realize how easy it is to accidentally transfer chemicals you can’t even see.
Seasoning isn’t optional
People clean their pan and call it a day. That’s only half the job. Seasoning is what makes cast iron work the way it’s supposed to — it’s what gives you that slick, nonstick surface without any synthetic coating. Skip it, and you’ll notice food sticking more, the surface looking patchy, and eventually some rust creeping in at the edges. A light re-seasoning after every wash or two keeps things in good shape. It takes maybe three extra minutes.
Here’s the quick version: after washing and drying, put the pan on the stove over medium heat. Rub a very thin layer of a high-smoke-point oil — vegetable, canola, grapeseed, sunflower, whatever you’ve got — over the entire cooking surface using a paper towel. Let it heat until it just barely starts to smoke. Pull it off the burner and let it cool. That’s it. You’ve just added another micro-layer to that polymerized coating. Burdey specifically recommends unsaturated fats for this, and emphasizes using high quality oil.
Then every few months — or whenever you notice the seasoning looking dull, flaky, or uneven — do a full oven re-season. Line the bottom of your oven with foil to catch drips. Preheat to 450-500°F. Oil the entire pan (inside and out) with a thin, even coat. Place it upside down on the center rack and bake for an hour. Turn the oven off, let the pan cool in there naturally. You might need two or three rounds to get it looking right again. It’s the cast iron equivalent of a spa day, and it’s genuinely easy once you’ve done it once.
When things go wrong
Okay, so what if you’ve already been making some of these mistakes? What if your pan is currently sitting in the cabinet looking crusty, rusty, or weirdly sticky? Don’t panic. Kat Kinsman over at Food & Wine — who, by the way, holds a master’s degree in metalsmithing and once rescued a hundred-year-old skillet from a chicken shed — puts it this way: unless your pan is cracked through, it’s salvageable. That’s worth repeating. Unless it’s physically broken, you can bring it back.
Rust? Scrub it off with steel wool, wash with soap and water, dry thoroughly, and re-season. Sticky surface? That’s often from too much oil during seasoning — the fix is to bake it upside down at 450-500°F so the excess drips off. Black residue flaking into your food? That’s usually just old seasoning or carbon buildup. Keep cooking with it, keep washing and re-oiling, and it clears up. A pan scraper or metal spatula handles the worst of the stuck-on stuff.
The real takeaway — and I think this is what gets lost in all the internet hand-wringing — is that cast iron is incredibly forgiving. People treat these pans like they’re made of glass when they’re literally made of iron. They survived being buried in chicken sheds for a century. They’ll survive a little soap. They’ll survive you scrubbing too hard one time. Just dry them, oil them, and stop overthinking it. The best thing you can do for your cast iron is actually use it.
