This product doesn't work for me. I use a vibrating cup and all that happens is a lot of noise and the brass floats on the surface of the pins and does absolutely nothing. This element can work in rotary massagers, but not in vibrating ones. I also have doubts about effectiveness as the description says to use a citrus based cleaner that will clean metals itself. So why would you want to increase the potency of the product? I sent them back.