Super slow clutch oil drip

[zawrilla]

Hey,

I've had this problem for quite a while now, but haven't done anything about it because it hasn't really caused too many issues, but I think I should eventually fix it.
Anyway... months ago I had a clutch slave cylinder problem which I replaced. When this was the problem, the oil dripped at a reasonable pace and would do so on any level of incline.
My current problem seems to only occur on flat ground (and maybe downhill, but I haven't tested this). If the car is parked on a slight incline then it doesn't leak at all. However, if I'm parking it continually on flat ground for long periods then at some stage throughout the week, or by the end of the week, I'm having to top up the clutch oil a bit.

Where could the leak be this time? Something to do with the line?

[SuperMazdaKart]

master cylinder?