this may be of use...or maybe not....but no harm in sharing
had to clean my CPU to re fit my cooler and tried to get hold of some isopropyl alcohol.....being in cumbria and asking various shops got looks as if i was deffo up to sommit dodgy like...me...as if....
anyways cutting the story short....rather than paying £4/5 for tub of the stuff marked up CPU cleaner, found that a bog standard CD/DVD cleaner (£1!!) pack contained a solution to clean that was 100% isopropyl alcohol...used it and worked like a treat...
ppl may already know this but if you didnt you do now.........