I have a cast iron skillet that belonged to my grandmother, I use it to brown meat for dishes, but I don’t cook steak in it. I clean it like my grandmother showed me-with oil and salt-no soap-it takes the seasoning off, so food will stick...
Actually, it doesn't. If the cast iron is cold, the pores in the iron are not open and a SMALL amount of something like Dawn on a sponge will cut the grease and won't affect the seasoning. Reheat to dry and give a quick rub with some veg oil on a paper towel. I clean mine that way and they are super non-stick.
I've heard of the oil and salt routine. I'll have to try that next time to compare.