I wash mine after each use with palmolive green dish soap and water and scrub with a stainless steel pad. Then I rinse well, put back on the stove and heat up to dry. Once dry cut the flame and I oil the entire pan and a lid with olive oil, spread around with a paper towel. Leave on the stove to cool off and then put away. Been doing it this way for long as I can remember.
My son had a pan that was all nasty, he said someone told him to never wash it. I had him put it in a outdoor fire until it turned red. The next day it was cool and clean as could be. He's been washing and oiling as I said above and seems to work for him also.
Just a tip for consideration

people got their own way of caring for cast iron, that work well for them.
I'm interested what others do. Caring for cast iron seems to be the biggest "issue" people have with cast iron. One of my other son's uses vegatable oil and says olive oil will go rancid. I've never had that problem, so can't say.
Jesus is Lord and Christ

