I have a 00 with about 15k on the odometer. Recently, I notice that after driving for more than 15 minutes, the clutch seems to provide more resistance to pressure and it doesn't feel as smooth. It never happens when the car is cold. Only when I've driven it for a few minutes. There is no accompaning squeeks either.

I did a search on the board and there seems to be a related issue with squeeking re: the Honda service new released in 2004 about lubricating the release fork. Can you guys think of any other possible reasons for my symptoms or am I having the the same problem? Can I do permanent long term damage my not addressing it immediately? Not sure since I don't want to pay out of pocket and it's unclear if my extended warranty would cover it. Thanks in advance.