How to clean window screens?

Remove the screen, use a foxtail or comparable bristled brush to agitate both sides of the screen. Use a damp cloth to remove any dust particles left before reinstalling. If needed, use a weed sprayer, and add Screen Magic. Lightly mist over the screen, wipe evenly with a microfiber towel and let dry before re-installing on the window. Use water and a hose as a last result for dirty screens. Let dry and wipe frames off.