Squeekey Fabia 2 clutch slave

Hi all, intermittently we are getting a squeak from the clutch pedal. I have isolated it to the clutch slave cylinder.

Is this a common issue and the slave needs swapping out or does it just go dry with hot weather and needs to be lubricated?

Also is there a parts database available to do a look up and a Haynes like online manual somewhere?

TIA