We have ordered the unit to an optician visit out of curiosity. The cleaning machine has arrived today and was of course immediately tested. The glasses have become fantastically clean. Then of course was the next test it - we have culled all jewelry and leave by humming. Some parts needed a second round, but this was also due to the stubborn dirt. After that, most things had become really beautiful and sparkle like new again. Some fake jewelry has not to be clean, but I rather suspect that it is the material. Bottom line, I am very satisfied with the device, at least for glasses it will become a regular helpers, other "victims" are still looking ...
