How do you keep it clean?
Soap removes the seasoning. Here’s some information from Lodge on how to clean their iron skillets.
https://www.lodgemfg.com/use-and-care/seasoned-cast-iron-use-and-care.asp
Drain last meal,scrape it(shouldn’t have to)wipe it, rinse it, h2o only, dry it!
http://www.wikihow.com/Season-a-Cast-Iron-Skillet
A GF washed mine one time and had to preseason the darn thing all over.
The skillet that is!
Let the dog lick it clean.