do not use vacumm cleaners around circuit boards.......
these things will cause a build up of static and discharge through the boards...
I have seen it. Back when I had a real job of repairing copiers for a large american based photo copier company, the new guys would vaccum out the dust from inside and around the boards and the sparks would fly.... the machine looked good without all the dust, but didnt work at all. A couple thousand bucks in new boards and everything worked ok again.
compressed air seems to work best to clean out the dust, just be careful.