The Ultrasonic Cleaner UC 5020 I have to "paces" getestet.Folgende parts had to clean the appliance: Glasses - rings, necklaces, bracelets, ear studs - Strainer - wet shaver - Tweezers - Nail Scissors - Nail File - mech. Can opener and silver, tarnished (ie black) teaspoon. The result: All parts are made perfectly clean! In the mech. Can opener, the silver coffee spoons or even at the larger rings on the inside depressions have (where the dirt like sets) I repeat the cleaning process several times. I expect an ultrasonic cleaner for home use not want him the dirt of several weeks, months or years away me in 5 minutes. I already have a smaller device from another manufacturer, but I am not been so happy with the size and the cleaning effect. It fit into no glasses! In the Grundig unit fit my 2 "reading glasses" into it! I have throughout the house, distributed these glasses in every room. Now I collect them regularly, put 2 pieces in the Ultrasonic Cleaner, briefly dry with a kitchen towel and already I have saved me a lot of time with "glasses cleaning". In addition, the unit also cleans really inaccessible places. This device by Grundig is handy and does not take up much space - the handling is very simple - the cleaning effect well - the automatic. Shutdown outstanding - disconnection by simply pressing a button (as opposed to my old machine) - all in all, I recommend this device at this price with a clear conscience!