As far as I see from tutorials and YouTube videos, it is almost a nightmare to clean a G53 Cpu or Gpu fan (I have G53JW) which requires detaching many parts including screen cable and hinges. It is simply a nightmare, and I can't beleive that Asus has made such a crappy design which makes this notebook uncleanable ny a normal home user, it is not self-servicable. G73 is way easier as it has bigger backcover and also way easier to upgrade. Damn...
ASUS G53JW-XA1