I inherited my grandmother’s cast iron skillet and nearly ruined it within two weeks. Why? Because I believed the internet when it said “never use soap.” So I wiped it with a paper towel after cooking bacon and called it clean. Two weeks later, everything I cooked tasted faintly of old grease and shame.

Here is what nobody tells you about cast iron: the “no soap” rule is mostly a myth, and following it blindly leads to a sticky, rancid pan that you are afraid to use. My skillet is now 60 years old and slicker than any nonstick pan I have owned. This is what I learned.

The soap thing (just use it)

Back when soap was made with lye, yeah, it would strip seasoning. But modern dish soap is mild enough that it will not hurt a well-seasoned pan. A drop of Dawn, a soft sponge, and a quick scrub — that is all you need. Rinse, dry immediately.

The real enemy is soaking. Do not let your cast iron sit in water. Do not put it in the dishwasher. Those things will destroy the seasoning and invite rust. But a quick wash with soap? Fine.

The scrubbing mistake I made for years

When food really sticks, people grab steel wool or those green scratch pads. That is like sanding your seasoning off. Instead, pour some coarse kosher salt into the warm pan, add a tiny splash of water, and scrub with a paper towel or a folded kitchen rag. The salt acts as a gentle abrasive that knocks off stuck food without damaging the seasoning.

Rinse, dry thoroughly with a towel, then put it on the stove over low heat for a minute to evaporate any remaining moisture. Rust starts the moment water sits.

The re-seasoning trick that fixes everything

After cleaning, while the pan is still warm, rub a tiny amount of oil all over the inside — I use canola or vegetable oil, about half a teaspoon — with a paper towel. Wipe it like you are trying to get it all off. You should barely see a sheen. Too much oil leaves a sticky residue.

If your seasoning is patchy or food is sticking, do a full oven re-season: coat the whole pan with a thin layer of oil, wipe it nearly dry, and bake upside down at 450°F for an hour. Put foil on the rack below to catch drips. Let it cool in the oven. One round fixes most problems; three rounds gives you that glassy black surface people brag about.

What actually ruins cast iron seasoning

Acidic foods. Tomato sauce, wine reductions, anything with lemon juice — these eat through seasoning if you simmer them for more than a few minutes. I learned this the hard way making shakshuka. The pan came out with dull gray patches.

It is not the end of the world — just re-season and move on. But if you are making something acidic that needs a long simmer, use stainless steel instead. Your cast iron is for searing steaks, frying eggs, baking cornbread. Let it do what it does best.