Modern dish soap won't ruin your cast iron seasoning

Yes, you can use modern dish soap on cast iron without damaging the seasoning.

The “never use soap” rule comes from the days when soap was made with lye, which strips seasoning. Modern dish soaps are mild detergents—they don’t have lye and won’t dissolve the polymerized oil layer that makes your pan non-stick. I’ve been using Dawn on my skillets for years and haven’t had a single issue.

That said, don’t go nuts. Use a little soap, rinse well, dry immediately, and rub on a thin layer of oil afterward. The real threat isn’t soap—it’s leaving the pan wet or scrubbing with steel wool like you’re punishing it. If your seasoning is already weak or flaking, soap might loosen it more, but that’s a seasoning problem, not a soap problem.

The whole “never use soap” thing is outdated. Clean your pans. Future food will taste better for it.