TLDR: one, tiny drop of Slip 2000 extreme weapons lube. I had this issue a few days into using the watch. Tried the Apple approved fix two days in a row, without positive results. Dropped a tiny droplet of the indicated, nontoxic, inert lube into the gap between watch body and crown. One week later, no issues. I use this lube in my AR rifles and 1911 pistols, you can run hundreds of rounds and clean up with a shop rag because it keeps fouling from sticking to the metal, doesn't attract dust, and stays put. Ymmv, not responsible for screwing up your watch, but it's working for me.