Hi, while I remove my ring everyday, I wear my studs, pendant and tennis bracelet 24/7 as I don't want to deal with loose backs and loose spring clasps. As such, you can imagine the gunk trapped there. I don't use the Jewel Jet as I've yet to buy a wattage converter (it costs as much as the Jewel Jet, nightmare, wouldn't have gotten the Jewel Jet had I known earlier). The hot water with detergent method doesn't work. Soft brush can only remove gunk that I can reach. How do you remove hard-to-reach gunk from dirty diamonds? Thank you.