I use a vacuum cleaner hose and nozzle to suck out the dust, having loosened it with a half inch paintbrush.
I'm told it is the rush of air past plastic that causes the static, but does it matter if it is sucking instead of blowing if you don't touch the computer with the nozzle?
What would I know, I'm just a pilot ( who refuels aircraft using 10/20 ltr plastic jerrycans !