I had seen YouTube videos of cleaning difficult to clean things and lead me to this purchase. I was excited to try it and did right away. I learned some tips 1st while waiting for delivery. Instead of contaminating the water, I put my glasses into a Ziplock bag full of soapy water and turned it on (Tip. Keep you cats away, let them out or put them in a back room - Trust me). Anyways, it was gratifying to see the disgusting clouds of dirt coming off, what I thought were clean glasses. Works as advertised if not better. Love it, love it, love it. (Did I mention that I love it?)