Normal dishwashing or laundry soap is good enough for cleaning a vinyl siding.
Good cleaning solution for siding.
After rinsing apply a cleaning solution to the siding.
However never mix ammonia and bleach rinse thoroughly while the siding is still wet.
To mix up a more potent solution combine 1 3 cup of powdered laundry detergent with 2 3 cup powdered household cleaner than add 1 quart of liquid laundry bleach and one gallon of water.
Not only does it fight mold and mildew growth but it works wonders at leaving siding squeaky clean.
For tough spots like paint drips tar and pencil and pen marks use a nonabrasive bathtub cleaner or nylon scrub pad.
Mix 70 water and 30 white vinegar to make a good all purpose vinyl siding cleaner.
How to wash vinyl siding as a low maintenance building material vinyl is just as easy to wash with a garden hose and a powerful vinyl siding cleaning solution as it is with a pressure washer.
It is the simplest method at your disposal.
Rinse the siding with clear water to remove dirt and dust that has accumulated on its surface.
If your siding is especially grimy you may want to consider renting a pressure washer to blast the worst of the dirt and gunk off first.
Use ammonia cleaners or a solution of one part bleach in four parts water to clean mold and mildew stains.
This solution removes less stubborn mold or mildew from the siding.
Opt for house siding washes and multi surface outdoor cleaners with inorganic solvents such as water or hydrogen peroxide or soaps containing water soluble surfactants like alkyl sulfates which.