R33 Strange Clutch Problem

[skyman]

when my car is cold i have normal free play and pick up point through the clutch pedal... nothing strange, but as the car warms up

the pick up point starts to move up, until there is absolutly no free play, the clutch is a 2 month old 7 puck exedy with chrome molly lighted flywheel.

the strange thing is that if it starts to rain or i drive over standing water the clutch goes back to normal, free play comes back and the pick up point moves back to normal as if the cooling effect of the water somehow changes something, but once it stops raining problem comes back.

i can still drive the car its just a pain in traffic or on up hill starts.

ive changed fluid and the clutch is not slipping ive also had numerous clutch specialists look at it but to no avail.

any thoughts