[wingnut60]

Ron,
I used a damp rag on both sides of the screen--seemed to work well, no dust showing. Also used a vacuum with the brush attachment first.
To me, taking the screen out is more of a hassle than the results justify--working on the outside may require a short step stool for us vertically-challenged guys.
Just be careful not to press too hard on the screen fabric.
Mine was a lot easier to do because I was replacing the windows and had the crank-out portion off while cleaning the screen.
Joe