i decided i wanted to give my system a good cleaning today, so i took the heatsink off and noticed that some of the arctic silver was on the side of the core of my 2400. i took isopropyl alcohol and tried my best to clean the core and the surrounding ceramic. the core is now clean, but the ceramic looks faintly discolored due to the as that i accidentally got on it. i went over it about 5 times and the discoloration is still there. how big of a risk am i running of frying this processor once i put the system all back together and fire it up? any tips for perhaps getting the discoloration to go away, or is it merely cosmetic