If ASUS engineers was smart enough to give us the ability to force the fans to 100% duty cycle, it would allow just to do this periodically break up any layer of dust forming and reduce build up massively........ Not a fan of how the designed the G74 connectors for the KB so I won't be opening it again to clean it, can be damaged easily.
Or even better force the fan to 100% DC at boot up for 5-10 sec that is user selectable....... not rocket science guys lol
What seems to work well is just blowing on the vents, tried it once and got a face full of dust surprising lol...... Since we can't force the fans, I load up the GPU to get the fans going.....
In short, load up the GPU (stress test, game, etc)....... use compressed at from far away, and slowly get closer, till it starts to break up...... compressed air TOO CLOSE to the vents will just push all the dust back in the Laptop.....
Good Luck
GL702VSK / GTX 1070 / M.2 960 EVO
HTPC MINI-ITX / FRACTAL CORE 500 / GIGABYTE GA-AB350N / GTX 1050 Ti Windforce OC 4G / RYZEN 5 1600 3.9GHz / M.2 960 EVO / G.SKILL Ripjaws V Series 3200MHz
OLD
ASUS G74SX-XC1 / INTEL 7260 AC / Samsung 850 PRO / TUNIQ TX-4 / BIOS 203 / 335.23