I've reported about this problem before, but only recently I've done something to fix it. To summarize, I've had my clutch pedal break twice, and two clutch cables break. We thought the pressure plate was causing the problem, since everything was lubed and working as it should. So in the past 2 weeks we replaced the clutch disc, pressure plate, throwout bearing and pilot bearing, and greased everything that needed it. Everything that moved and grinds has grease.
I read over some other threads here on the forum, and I couldnt find a solution. I don't do any off roading, so it couldnt be mud or rust. We've pretty much replaced everything in the clutch portion of the car; the cable, the pedal, the discs and the bearings. It's so hard to press, it's to the point where my knee is hurting really bad. I'l a tall guy and I don't have a tilt wheel, so this is a big issue for me. I've been thinking about selling it for an automatic truck, but I really hate to let this awesome car go.