Yeah it is. I always use dish soap, and it will definitely take off any oil that hasn't been polymerised. I think the people who believe this (and use cast ir

Yeah it is. I always use dish soap, and it will definitely take off any oil that hasn't been polymerised. I think the people who believe this (and use cast iron) probably haven't seasoned it hot enough or have scraped off the seasoning close enough to the metal.