>>297910You should NOT use a computer duster, but that's not why. [By the way, full of dust? wtf...]
You can (and often will) completely screw your sensor. I've had someone come in who'd killed their D3 cleaning it with a computer duster. I don't know if it's simply the pressure, or that they managed to shoot liquid instead of gas, or if it's due to it being not air but difluoroethane.
In any case, it's a good way to destroy a camera.