. This cleaner works very well. Just pour regular tap water into the stainless steel tank up to the fill line, put items in, press the switch and let it clear. It works for 5 minutes before turning off automatically. It vibrates and ultrasonic waves create small cleaning bubbles. I tried the coin but it didn't clean very well. Probably because he was too tainted. But I put my wife's ring in the cleaning machine and was amazed at how well it came out. You could see debris in the water so I know it worked. I will continue to experiment with other items but I recommend an inexpensive cleaner of this type.
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