I am travelling around a lot, and my laptop is picking up plenty of dust. Lately it is making quite a bit of noise and getting hot. I assume the air vents must be blocked. I always make sure that it isn't sitting directly on a surface but has enough room to circulate air underneath it. I went to a computer place and they wanted to charge me $25 just for cleaning out the vents with a special machine. Surely, they must be a cheaper way. How do you take care of your laptop?