Originally Posted by Zenith Phantasm
I tried a larger handle screw driver but none of them fit the screw. I tried using pliers+eyeglass screwdriver but it wouldnt budge.
Then get the proper tools before wrecking anything and everything.
Let me guess, you have one of these?
If you do, drop it. Before you end up stripping everything the drivers touch. The drivers at this point probably have worn out already as well.
Get yourself a quality #1 philips head driver. A 2mm flathead should work as well.
LMB is easy to fix. 3 solder joints, if that's too much than just open the switch and refurbish the spring.