Borax aluminum siding cleaner recipe cup of borax bleach 1 gallon of warm water bucket or pressure washer.
Borax to cleaning aluminum siding.
How to use borax to clean and protect a deck from mold and termites youtube.
Borax solution for cleaning mold off vinyl siding.
You can also look for special cleaning solutions that are meant for cleaning aluminum siding at your local hardware store.
To distinguish between mildew and dirt apply a small amount of bleach on the area in question.
Vinegar and borax are other good eco friendly alternatives for cleaning mold and mildew.
Borax is a natural anti fungal and antiseptic.
Scrubbing with a soft bristled brush or nylon scouring pad for exceptionally tough spots can render clean fresh siding.
Borax can also be part of a permanent remedy for black mold treatment on vinyl siding or to clean mold from wood on your deck.