I flushed and bled my brakes last night (for the first time) using the Mityvac method. I did not flush the clutch cylinder due to time constraints. My stupid questions are these: If the master cylinder and all of the brake lines now have new dry fluid in them, wouldn't this eventually circulate into the clutch cylinder? If so, I assume this would partially defeat the purpose of flushing the brakes since some of the old clutch fluid will be mixing with the new fluid, but how much old fluid are we talking about? Isn't a system with 25% old fluid better than one with 100% old fluid?