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| Joined: | Sun Feb 26th, 2006 |
| Location: | Oregon, USA |
| Posts: | 2897 |
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I clean case and bracelet parts all the time in my ultrasonic cleaner, of course I disassemble the watch to do this. As long as the movement and dial are out you should still be safe to clean the case assembled, one thing to consider is watches like seiko have a chapter ring that installs from the front and if you leave the chapter ring in the watch case it may come out of the ultrasonic cleaner without paint and markers! You should remove the crystal and remove the chapter ring prior to ultrasonic cleaning on watches with this design.
Models that have chapter rings attached to the dial or no add on chapter rings like rolex submariner for example you can throw in the ultrasonic cleaner with the bezel and crystal still installed. If you only use water you wont have to worry about the bezel inserts even.
If you use any kind of detergent then you may want to remove bezel inserts too. I use a small amount of dishwasher detergent in my ultrasonic cleaner because it cleans very well and doesn't have a surfactant so it doesn't foam or bubble up.
If and when you do advance to cleaning actual watch movement parts you will want to use watch cleaning solution because household cleaning solutions are too costic or will cause ferrous metals to rust so you will remove decorative gold plating and ruin mainsprings and older screws!