I am getting ready to move and discovered all this dust in the areas you can't see. I began with a soft dust brush going over everything, the keyboard, the printer, the back of the hard drive, router, and power strip. Then I used my hair dryer (not too close) and blew out the keyboard, the back of the hard drive, and all the wires. I could not believe how clean everything became. Now I will remember to do this on an every 3 month basis. I am sure it helps the computer run better.