This is what I use. It works great. Ya just wipe down the dash and "swirl" the stick outside to remove all dust. I also use this on the truck when there is a light dust on it prior to the Detail Spray.
This was shown to me by Adam's good friend Alan who is a big vette guy and lives around the corner from Adam's HQ
You can get for about $8 and Bed,Bath and Beyond or any of those type stores.