I was having a chat with a friend yesterday. He told me he submerses his entire watch in his ultrasonic cleaner to give it an exterior cleanse. I asked why he stated its a Sub and its waterproof.
Common sense tells me this is not a good practice and Id NEVER do such a thing. The movement being subjected to the ultrasonic vibration may affect its operation is a thought I had. It had me thinking, I've never seen such a practice mentioned in the forums before, or I've missed it. Any watchmakers care to chime in, I'm curious in your opinions pro or con for such a practice.
Best
Mike