Hi! My car, a '03 Ford Taurus station wagon leaked a good amount of transmission fluid onto the rough cement garage floor and the gravel driveway. First question is 'Why?' because the transmission mechanic found no problems with it and just refilled with fluid. Second, what kind of cleaning solution is safe to use with transmission fluid and will work well on the gravel area where the spill occurred? Additional info, it was 90 degrees out when the fluid leaked so might that have anything to do with it?