havin a strange problem with my clutch, when i get into the car when it cold the pedal bites about half way down, but then after it warms up it rises up, like when im drivin for a half hour or so the clutch bites right at the top, if u even rest your foot on the clutch itll slip it, the clutch os an exeedy paddle job an havent had any other issues with it, it bites realy well ! bit confused, what would cause this? would oil gettin onto it do this an cause it to expand?