it's 'isopropyl' alcohol gaara.
99% isopropyl alcohol and a q-tip easily removes the stuff.....crazy that they actually state it 'voids your warrenty' however like gaara said and I said...they'd never know in the first place...plus it's lame considering they have heatspreaders....on the ones that have the core exposed and resistors right near it like on the XP's it's a little more understandable, but MEH, whatever.