To thoroughly clean my RV window screens I remove them and wash them with soap and water. If they are merely dusty, a micro fiber towel will do a great job without using water.Simply wipe the dry towel across the surface of the screen and it will pick up the dust. I couldn't believe how easy it was to clean the screens the first time I tried it. From this...to this, in only a matter of seconds.
You can pick up a 36 pack of these 16 x 16 inch towels for around $15.00 at COSTCO. Micro fiber towels are also available at auto parts stores, WalMart, Home Depot, Lowe's and many other outlets, but the best price I've found is at COSTCO. They are also great for washing and waxing, and general purpose cleanup. If you've discovered other uses for micro fiber towels please share it with us by leaving a comment.
Helping you micro manage your dust - Jim Twamley, Professor of RVing