Kyocera K7 cell phone dust problem

In the course of carrying my Qualcomm Kyocera (from Virgin Mobile) K7 RAVE cell phone in my pocket, the outermost display "window" shows dust particles behind it, making viewing of the alphanumerics difficult. Obviously, I'd like to remove the dust and wonder if there is an easy way (without damaging the phone) to remove the phones case which holds that display window-then blow the dust off. And then reassemble the case.
Thank you.