I need to open The Dell Black 5-Button Bluetooth Travel Mouse, but it seems to be solid build, there is no screw in the bottom. Is there any how to on the net, or technical documentation how to do this?

Why I need to open it - one of the buttons (left one) sometimes makes a double click, it seems that switch inside the mouse which is assigned for LMB get loose, and do not work properly. Second reason I'm after the guarantee, I don't have any service close to my location, I dpn't want to throw my mouse to trash can, and buy a new one.

How to safetly open this thing?