Ok I understand that the paste goes in between the processor (Small triscuit sized metal thing with lots of pins on it) and the processor fan and heatsink (heavy assed fan that came with my triscuit). All fine and dandy, except that the bottom of my processor fan came with this gray substance in a small square on the bottom of it. Should that be REMOVED before I put the thermal paste on or should I not bother with the thermal paste?