> Soapy water won't break down the molecularly bonded fat and iron on your cast iron.
In that case I'm not sure what the exact mechanism was. But I know that after others have used/cleaned a seemingly well-seasoned pan I've had to deal with chips, flakes, and/or rust and had to go back through the whole annoying seasoning process. And of course it's entirely possible that despite carefully following instructions that I've done the seasoning wrong -- chemistry is the only class I ever flunked.
> A drop of water should dance on a properly heated steel pan and things won't stick.
My partner made a similar recommendation. It sounds trivially easy but for whatever reason I have not managed to make it work. Given that cast iron (generally) works fine for me I've had minimal motivation to learn the idiosyncrasies of another material, though I would like to give it another shot at some point.