While SF Gate reports several ways to clean nylon window screens, one that provides good results involves washing them in the yard using soap and water. You need a bucket, mild liquid dish detergent, and a nylon net scrubber or child's hair brush for scrubbing.Continue Reading
Look for plastic tabs and spring clips. Pull the screen toward the springs to remove. Depending on the screen you may need to push the frame using your fingers or slide pins to release the screen.
Mix about a teaspoon of detergent in the bucket of water. Avoid harsh cleaners such as those containing bleach or ammonia. This helps your screens last longer and allows you to avoid breathing unhealthy fumes.
Dip the brush or scrubber into the solution. Wash the screens and their frames. Be careful to avoid bending or twisting screens while washing.
Continue to spray water on the screens until there is no more soap in the rinse water.
Spread a blanket or tarp on the grass or patio. Lay the screens on this clean surface to allow them to dry before installing them back on the windows.