Review on Contact Cleaner Portable Ultrasonic Cleaning by Sharon Payne

As a jeweler, I have been using ultrasound in my shop for over 30 years. When I saw this I thought "how cool" and ordered one. First, it's not an ultrasound. I'm not going to delve into the science of wave frequency, but it is NOT! Second, I'm not sure what he did, but the unit got so hot it melted my contacts after the rinse cycle button was pressed and I was in the shower. He literally melted them and boiled the lentil solution for 3-4 minutes. This block was brought back and is a destruction hazard at best and a fire hazard at worst in my opinion. I would not buy it again!