How to Repair a Mouse Button That Is Not Working
Click a mouse button enough times, and eventually, it will fail. It is not a matter of if it will fail, but when. Rather than throwing your mouse into the trash and buying a new one, you can repair the mouse button for a couple of dollars or less by replacing the faulty mouse microswitch.
Here is how I fixed the non-working middle button switch on my mouse for less than $1.