Not sure if this works as I just tried it and noticed 0 difference, of anything DONT do it because you can potentially overtighten it and strip the threads.
I applied a tiny square of a rubiks cube sticker to the left switch which did help with the responsiveness.
Also, about the hollow button, you can try to adjust the screws a bit (aka loosen and tighten the screws) and try to find a combo that makes it better.
Originally Posted by frunction
you can actually adjust the click by tightening and loosing the front screws. I just tightened a lil bit.