Squeaking sound when clutch is pressed Options

[reko]

I know there is a guy who started a thread about that but that's for him, not me.

My clutch is about to die. Sometimes it shifts good, sometimes it slips.
It's been going like that for 2 months. It can shift perfect for a day, and then if I got WOT or not to far from that, it starts to slip.
I can also shift, release clutch pedal and then it still slip as if i was giving gas while being at the friction point.

Thing is i realised that when i press / depress the clutch pedal, i hear a squeaking sound comming from the engine bay.
I think it comes from my clutch Slave cylinder.
I have another one at home that also comes from a 94GT that wasnt squeaking.

Any thoughts on that? Should I change it? Or there is no relation between this squeaking sound and my clutch?