I have an iWatch version 2. Overtime; the digital crown became stiff and I really had to press hard to bring up the screen.
The question was how to clean it?
I checked the supportnotes and the direction was to hold it on a stream of water. Kind of a surprise considering it’s a computer.
I shut off the iWatch and at the sink; enabled a tiny stream of lukewarm water. I made sure only the digital crown was under the water. The iWatch was watch face up and the digital crown was pointing downward at a 45 degree or so angle (I didn’t measure).
I gently turned the digital crown. It slowly loosened. However, it was still kind of rough. The technote said for on 10-15 seconds. I decided to continue (roughly 30 seconds). At one point; it felt like it like a blockage had been removed and the digital crown turned like it did when it was new.
I used a lint free cloth to dry the iWatch and even let it sit for a little while.
I powered it up and everything was fine.