ok, the clutch hits the floor on first press but then works. but if it's left for a for about ten minutes then pressed there's no pressure then next press works ok again. I've bled the system now about a thousand times and no air! I've check all the connections, I don't know if it's so cut and dry but surely if air can get in fluid can get out?, and no leaks! so I'm confused please somebody help.

cheers!