im not sure how to address this, but i need some input..so here goes...

i have a 95 accord ex (4cyl, MT). if i don't use it for a long time (say 2 weeks or longer), the clutch fluid reservoir becomes empty eventually, and i lose hydraulic pressure in the system (i.e., air gets in the lines). now, my first suspicion is a leak somewhere in the system...BUT if that's the case, how come i dont see this problem when i use the car regularly (every other day or so)

thanks for input...