Rinse with a hose from top to bottom.
How to use simple green siding cleaner.
In a bucket or large container mix 1 5 cups simple green oxy solve house and siding cleaner in a gallon of water.
In a clean bucket add 2 cups of simple.
Rinse at high pressure keeping the nozzle at least 2 feet from the surface and the spray perpendicular to the surface.
Use a soft bristle brush to apply the cleaning mixture in sections scrubbing firmly enough to clean without damaging.
Rinse with a garden hose at highest.
The oxygen bleach will clean the vinyl.
Clean in sections using a soft bristle brush.
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Allow cleaner to dwell on surface for 3 5 minutes.
If you are concerned about landscaping use a vinyl siding cleaner solution comprised of one gallon of water mixed with one cup oxygen bleach in a bucket.
At low pressure setting apply simple green oxy solve to an area that is small enough to be rinsed before it dries.
Allow the cleaning solution to remain on the surface for several minutes but not to dry.