Thank you to the German company who sold this product. Bit expensive, this does not make miracles but all the same it is doing its job. The glasses stand always spotless. For the earrings I had to make several cleanings every 3 minutes and yet they are not flawless, of course I will have to return the cleaning, although they still look better. Attention in the instructions it is very clear that we must remove the objects from the system shutdown, so after 3 minutes, otherwise the risk of dirt redepositing on them. Negative point, the tank is really mini, which complicates the cleaning of medium-large objects. But the biggest vessels are considerably more expensive. So for small items like sunglasses great!