Clutch Issues

Hi there

I have a 2014 ford focus 1.6 tdci (circa 65k miles) and since problems occuring during bad winter weather a few months ago, it appears that related or unrelated have been caused.

I am having no issues getting the car into gear and no pulling off.

However i have had the following:

- little squeak from the clutch pedals at most times)

- when in higher gears (usually) and/or during long driving spells, the clutch pedal is sticking half way up just after the biting point. In and around these times the clutch pedal is incredible soft with little or no resistance.
- After some use of stop amd go it appears to not be as soft on clutch.

Can you please advise what works is likely to be involved/ needing done.

Thanks

Daniel