On another site I see where a person can run into a problem with the clutch slave cylinder getting clutch dust into the clutch hydraulic fluid and cause the cylinder to hang up. It's a fair job to pull the cylinder on these newer cars. Surely someone can come up with a cylinder that is properly sealed. How about an accordion bellows over the shaft so that dust can't get anywhere near the cylinder shaft. The car assembly body shop is a dusty dirty place and that is what we did with the weld gun air cylinders to keep the sparks and abrasive dust out of the cylinders. Time to put a bug in the ear of an aftermarket company to come up with something, but who? Perhaps Manny know someone.