I've noticed an increasing amount of white dust being blown out of my vents lately. I drive an '09 Frontier with only 3k miles on it, and ever since I've owned it I've noticed my interior slowly accumulating more and more white dust. I thought that maybe it was just the air system clearing itself being new, but now I am starting to wonder. I especially notice it blowing out after the car has say awhile and I crank the AC when starting the truck. Does anyone have a guess as to what this could be? I've read about this occuring in other vehicles (Lexus) and haven't been encouraged by the outcome. Any help/opinions/ideas would be greatly appreciated!