If you can’t safely reach the screens from the outside, vacuum from the inside of the porch (still working from top to bottom). Afterward, switch to a crevice attachment and vacuum the corners and edges around the screens.
Alternately, use a power washer to spray the screens. Stand several feet away and use the lowest pressure setting to avoid damaging the screen.
Scrub the entire screen if you notice significant dirty spots or if the vacuum and hose combo was ineffective. Wash the frames around the screens as well, since they can accumulate dust and dirt over time.
Alternatively, apply a spray-on cleaner directly to the screen and let it sit according to the instructions on the bottle before scrubbing and rinsing away.
Spray the screen clean with a garden hose afterwards. Alternately, smear the rust spots with a paste of baking soda and water and let it sit for up to 10 minutes. Scrub the rust away with a soft brush and rinse the screen afterward.
Bleach can discolor aluminum, so rinse away the bleach as soon as you’re done removing the mold. If you’d rather avoid harsh bleach, try a mixture of equal parts water and distilled, white vinegar instead.
