Soap doesn’t remove seasoning, but it can remove some oil.
Cast iron is beloved for its natural non-stick quality. This is built up over months and years of use, as a layer of seasoning develops on the pan’s surface.
Similarly one may ask, can you use Dawn dish soap on cast iron?
Yes, you can actually use soap on your cast iron!
The first is that since oil is used to season the cast iron skillet and create a nonstick surface, soap would effectively wash away the cure that you worked so hard to build.
Wipe interior surface of still-warm skillet with paper towels to remove any excess food and oil. Rinse under hot running water, scrubbing with nonmetal brush or nonabrasive scrub pad to remove any traces of food. (Use small amount of soap if you like; rinse well.)
Also, should you wash cast iron after every use?
Cast iron skillets should be cleaned after each use. Some clean their cast iron skillets by wiping them with a little salt and a paper towel. Others rinse them with warm water, with or without a squirt of dishwashing liquid.