BTW, I have grandmas iron skillet and its been put in hot soapy water and scrubbed with a metal scrubby a couple times a week for the past 100 years. It works just fine.
I think when you’ve used a pan so long, the seasoning is thick enough that scrubbing now and then won’t affect it.
For a new pan or one that needs refurbishing, I think Nifster has the ticket.
I’ve seen really bad old ones cleaned by fire:
https://www.youtube.com/watch?v=iUzPK4HAP0Q
Cowboy Kent Rollins has daily care tips:
https://www.youtube.com/watch?v=a5NbQwzwUTw
I have one we've had for 20 years. I do wash it with dish soap (lightly). I then put it on the range, heat it up, put a few drops of olive oil in, use a paper towel to spread it around as a very light coat, let it continue to heat until it starts to smoke. I turn off the heat, let it cool, and put it away.