where would i find thati bought a small bottle of isopropyl alcohol over 3 years ago and it's still about 1/4 full. works great
the best stuff to use is this: http://www.overclockers.co.uk/showproduct.php?prodid=OA-001-AK&groupid=701&catid=57&subcat=27
fan one pulls air into heat sink>heatsink>fan two pushes the hot air out of heatsink
basically that
heres a comparison
http://martinsliquidlab.i4memory.com/img/FanShroudTest3-38mm2000.png