Mine is perfect after the dishwasher.
It just needs a tiny bit of olive oil to cook the next thing.
I think the whole “don’t wash cast iron” is myth created and followed.
I’m guessing some dirty hippies from the 60’s or maybe Beatniks from the 50’s created this falsehood.
Probably another part of the Communist Manifesto that was unleashed to destroy our culture.
Wrong can’t blame hippies
Google it
Everyone says no dishwasher