Schade Logitech !!! 2 times twice G600 Laser-death!

So now I had two of these mice: A white G600 from July 1013 to December 1013 and a black G600 on Dec 2013 to yesterday. The mice work great and were reliable up at a stroke died in both the Laser:

Maus1: movements were becoming stronger gradually over 3 days. At first I thought it was up to the surface but on the third day went something on any surface. The lights of the laser was no longer perceive. Clicks still functioned.

Maus2: I have brought them directly as Exchange, since the G600 by then was so great. And all was well. Until yesterday. My black G600 makes hardly with bewgungen. Clicks are no longer registered. Again: The laser is no longer watching. Whether on computer, laptop or Raspi.
Fortunately I still have my very old Logitech MX 510th (Robust and indestructible)

If such a thing happened after half a year using a mouse: OK. But with two mice? That must not happen.

Conclusion: Buy yourself the mouse! You simply fun. But in any case retain proof of purchase and possibly packaging to Umtauschaen or resend.