Complaint Review: logitech

I bought an M557 mouse about a year and a half ago. In the last two months of use, I'm having a serious problem with mouse in losing the Bluetooth connection with the PC. I tested on 6 different computers with different versions and operating systems, and in all, the mouse presented the same problem. And then, Logitech, how to solve this problem? I've done everything that was recommended on Logitech's official website and nothing was solved. I found on Amazon.com several people with the same problem. That is, beware when buying the M557 mouse.