I had the same prob. on my 5 th gen accord ex. I t was the clutch master cylinder. I had to keep aclose eye on the clutch fluid resevoir to make sure the levels we high enough. I had a leak. You may want to check under your car for any leaks. If it's leaking, then you may want to check your timing belt as well since they are in clse proximity to each other. Mine was leaking all over my t-belt and the chemicals in the DOT 3 fluid will prematurely corrode the t-belt.