If mold or mildew is the culprit spraying with a bleach solution will remove it.
Clean algae from aluminum siding.
To clean aluminum siding start by mixing water liquid dish soap and white vinegar in a large bucket.
You can also look for special cleaning solutions that are meant for cleaning aluminum siding at your local hardware store.
Clean vinyl siding with vinegar.
Starting at the top of the section apply the vinegar and water solution with a long handled scrub brush.
Aluminum is not vinyl however so whether you are scrubbing or spraying go gentle or your siding with dent.
Luckily cleaning vinyl siding is a fairly easy job and there are a wide variety of products to help remove typical stains.
Step 2 dip a long handled soft bristled scrub brush into the cleaning solution.
Then submerge a long extendable scrub brush in the cleaning solution.
Your standard household whitener it appears to make mildew vanish but on porous surfaces such as wood or vinyl siding chlorine evaporates too quickly to get to the fungi s roots guaranteeing regrowth.
Spray the siding with water from the garden hose to remove loose dirt and debris.
Spray this mixture on remaining spots.
To clean aluminum siding having mildew use a solution of one part bleach and four parts water.
Maintenance is the first step to preventing the build up of moss algae and mold.
Fill a bucket with a solution of 30 percent white vinegar and 70 percent warm water.
It s not uncommon to have a mildew problem on aluminum siding depending on where you live.
Use a long handled soft brush to scrub the section giving particular attention to the dirtiest spots.
If you don t have an extendable brush try attaching a car wash brush to the end of an extendable painting pole.
Another way to clean your vinyl siding without a pressure washer to use a white vinegar and water solution.
Use one of the homemade vinyl siding cleaning formulas above and rinse off all solution after scrubbing.
When mildew gains a foothold homeowners often turn to diluted chlorine bleach sodium hypochlorite a k a.