
Hummm!!! You think something is clean but take a closer look! This the front part of my computer, a fan, that I took out to dust!

Look at the dust that accumulates INSIDE the computer!

Yours may be this way too. My computer is easy to take the cover off so I often dust inside. You can use an air can to get most of the dust. But to really clean the fans, I had to also use tweezers and a toothpick to coax the dust balls out. And my computer isn't even that old! Well, it is now all clean!! :) :)