Symptoms : squeak sound from inside boot or inside car from clutch pedal areas.
Assumptionv : Car clutch is working fine
Quick solution :
In the boot spray the WD40 in the rubber boot area where the slave cylinder is located while other person keep pressing the clutch minimum 20 times.
Leave it for 5 minutes.
or come inside the car
On the clutch pedal
lube the spring + pivot rod which pushes inside + the connecting rod.
keep pushing it by hand everytime you lube
look for any damage parts if any it has to be replaced.
Now come to the boot
spray the same area using white liuthum grease and press clutch for minimum 20 times.