94 Teggy LS

Replaced clutch disch, pressure place, throw out bearing, pilot bearing, master and slave cylinder, resevoir, and resevoir tube. The only thing i havent replaced is the actual hydralic line itself. I cant find any leaks but then again its hidden throughout its way through the engine compartment. After time the clutch will get very hard to push down, when i say time i mean an hour or 2 or driving. The clutch pedal needs 3 times the effort to push it down to activate the clutch. When it does this it doesnt catch until the very top when its normally right in the middle. And the clutch will slip when given 1/2 to full throttle in pretty any gear. If i bleed the system it works wonderfully. Please help me figure out what the problem is. And if there is an easy way to replace the line or something. I need help this is the 2nd post with no help.