I tend to be hesitant too, but then I think that I would rather know my stones are loose and have it fall out there versus elsewhere.I would be hesitant to put that ring (in the picture above) in an ultrasonic; rather, I’d stick with soaking in warm water and dawn and a soft/gentle scrub with a baby toothbrush. It just looks too delicate IMO.
Does the steamer clean by the ultra high heat or the pressure from the steam?I can’t comment on if you should use both or one over the other, because I’m not an expert. My rule of thumb is my two diamond pave bracelets do not go in the US and are only steamed and not often. I also hold them further away from the steamer nozzle. However for my prong set, I use both US first then steamer and it works perfectly! Super clean!!
Here is the US:
Here is the steamer: