Man I feel like a real red neck, dont have a jubilee band on my Sub., but I use Dawn dishwashing soap on a "soft" toothbrush and scrub it well, and then rinse with the sprayer thing on the sink. If its really grubby I will soak it for a few hours in a soultion of Dawn and water.
I guess the ******** are on the right track. You basically need a good detergent to cut the grease and then brush or rinse the dirt away.
Everybody has their favorite formula. At work, all the watches and jewelry are cleaned with
powdered Tide and a generous splash of ammonia. Whether in the ultrasonic or by hand, this is what we use. We never put a cased movement in the ultrasonic.
Some of the jubilee bracelets are so filthy that we must give them several cycles in the ultrasonic. We also use a commercial steamer to blow out the dirt that hides where you can't reach with a brush and won't rinse away.
Steve