Yeah I know what you were talking about. I didnt mean suck it out with your mouth. Sucking it out with a vaccum cleaner is risky.
I was helping a frined of mine here at school the other day when we installed a new hard drive. He had more dust in there than anything else. Almost three years of letting it accumlate. We took everything out into the hall and blew out all the dust. Its not hard and its much cleaner. The only other thing we did was with a cloth wipe down the inside of the case, but nothing eletronic.