The clutch take-up in my sisters car has dropped to the floor about 4 or 5 times recently. I've looked through the clutch line and it doesn't seem to be leaking anywhere, and the reservior hasn't moved at all. Bleeding the clutch fixes it temporarily, but next time the car is used take-up is at the floor again.
Would the problem be with the master or slave cylinders? If so how do I go about checking them?
Car is an 94 Corolla 4afe-c52, and only gets driven once or twice a month.