I'm trying to remove a screw from a drive cage and it just keeps spinning in place and won't come out. There is no nut on the other side. The screw is not out far enough to fit a phillips head or even box cutter blade between the screwhead and the metal case. I have also tried pushing down on the thread part while I unscrew the head to no avail. I don't have enough room to fit a hammer. I put some graphite spray on the back which didn't help either. Help! Thanks