Is this a common issue? So you literally get the crown wet to fix it? Isn't this risky? I thought the watch was only splash proof?
If you wear the watch to workout and sweat its common. I wash my watch in the sink under hot water every 2-3 days or as needed but on average every other day. I swim with the watch and its been to water parks. All no issue. True the rating is IPX7 but that gives you up to 3 meters of water for up to 30 minutes based on the rating but others have done much more with no issue. The Apple instructions tell you to remedy a stiff crown by running it under warm water while turning and pushing the crown. No worries.
https://support.apple.com/en-us/HT204639
The support article says to turn it off first. I don't and neither does my wife.