When he said Goo Gone, I was thinking he meant Goof off which is fine to use on the cpu or heatsink, but I would still clean it after that with a high % Alcohol.
I don't think Goo Gone would hurt the die, but I would use Alcohol after it. Same goes for the heatsink. If the Goo Gone has any kind of oils in it I wouldn't use it at all.
Pure acetone or fingernail polish without any kind of oils will work also, but again use alcohol after it.
Here's what you should do, drive to a drug store and get some 91% or higher alcohol and that's all you need. If you can't drive or don't drive yet...have someone take you. Use the alcohol and nothing else, unless you got something on the die that doesn't come off like I had with mine. Then in that case use something stronger like specified below which I got off the Arctic Silver web site, but again use Alcohol after that;
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ONLY Arctic Silver thermal compound should be between the processor core and the heatsink. Remove any thermal pads or other interface material from the heatsink before applying the Arctic Silver. Thermal pads can be scraped off with a plastic tool that will not scratch the bottom then the remnants can be removed with a xylene based cleaner, (Goof Off and some carburetor cleaners) acetone, mineral spirits, Akasa TIM-Clean, or high-purity isopropyl alcohol.
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