Girlfriend's '99 Honda Accord - clutch started to fail (not enough travel on slave cylinder). No problem, changed the master and slave. Did a good bleed (using tubing into jar routine.) Worked fine - girlfriend impressed . Then the problem came back . A bleed lasts 2 or 3 weeks then slave travel falls off and I have to bleed the clutch again. Done this three times, so looks like air is slowly getting sucked into the system somewhere. No visible fluid leaks anywhere. Any suggestions on what to do next? Little rubber seals on the clutch line fittings? Clutch line itself? Tube to fluid reservoir? Thanks for any help!