2008 Volvo C30 - Clutch sticks

The clutch pedal in my 2008 Volvo C-30 RDesign will sometime stick in a 1/2 way to the floor position.I can put my toe under it and pull it up.This only happens when the air temp is above 80 gegrees (summer).The dealer just keeps lubing it but I think there is a bigger problem.Car has 150,000 miles and I am the original owner.Has been dealerserviced since new. Ideas? Thanks.Ben Johnston

May I just say, very cool car? I drove one once and loved it. I’d try a local mechanic that has some specialty with Volvos if you can find one.

Thanks. I really like the car.I bought it new and it now has 150k on it.Only Volvo mechanics I can find work with the local dealer. Do good work generslly,but even they cant figure out the clutch issue.Ben