Clutch pedal

[Liotta]

I own an 85 4000 Quattro--  about 130K miles.

Recently--  the clutch pedal does not come back to the up position--
SOMETIMES!
The clutch is fine for about 20 miles-- then it just lays 1/2 way
down--- and I have to use my toe to pick it back up--  not a real big
deal-- except in 1st or reverse---  when things are close to you!  It
acts this way for about 10 miles-- then it is fine again.

Can any one help??

Thanks very much-- Rick.