With appropriate detergent was my glasses, rings etc but sparkling clean. I definitely recommend a special ultrasonic cleaner and no dishwashing liquid!
Would still work my unit I would have given 4-5 stars, depending on how the replacement instrument itself suggests I will possibly update again.
Update 12.12.2012
The replacement unit proposes bravely, it does what it is intended, the price is okay (the corresponding detergent vorrausgsetzt course)
Pieces on 4 stars on
Update 21:06:13
The replacement unit has been in the same way as the initial delivery adopted. I am really disappointed because the replacement device about 10 times was in operation and now it stinks again and only hums, ultrasound is no longer available. Amazon takes the item back but and reimbursed all costs. In order for the company Grundig is no longer an option for me (Made in Germany yesterday, hello made in China -.-)
Actually, one would have to distribute 0 stars because this is not going I have to evaluate with an asterisk.