My neighbor w/ an '06 C6 coupe came over and said that his clutch was staying on the floor yesterday. He had to toe it back up as he was driving. The solution was to bleed and replace the clutch fluid as it had become "dirty". The dealer told him DOT4 fluid was the product and to keep a close eye on it. He only has 13k on the car, has a few mods and runs timeshots every weekend. Could that be a factor, and has anyone else experienced this?