mechanical issue

I got a steelseries titan smth I think,and since like half a year my c key only works partially,sometimes it works soemtimes doesnt. After taking the keyboard apart for cleaning Ive found a small dent in the sensor for the button(follow up image) and that should be the reason for it since the...

So last night while gaming I must of hit my scroll wheel hard or something since it ended up breaking. The scroll wheel seems like it fell out of place and when I scroll nothing registers. Additionally, my scroll wheel seems to get stuck if I scroll too fast back. It has also became loose, with...