I'm using the stock HS/Fan that came with my Athlon XP, the one with the pink sticker on the bottom. I had to remove the HS, but now some of the tape came off the HS and stuck onto the CPU core. Is it okay to put the fan back on the CPU? If not, I have another heatsink w/o the sticker that I could use. How easy would it be to take off the sticky stuff from my CPU core?