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.
Good cleaning solution for siding.
To use any siding cleaning solution begin by rinsing your siding with regular water using your gardening hose.
One of the best cleaning agents to try is vinegar.
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.
After rinsing apply a cleaning solution to the siding.
However never mix ammonia and bleach rinse thoroughly while the siding is still wet.
Take an adequate amount of soap and mix it with warm water to make a soapy solution one part soap to ten parts water.
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.
Not only does it fight mold and mildew growth but it works wonders at leaving siding squeaky clean.
Normal dishwashing or laundry soap is good enough for cleaning a vinyl siding.
Rinse the siding with clear water to remove dirt and dust that has accumulated on its surface.
For tough spots like paint drips tar and pencil and pen marks use a nonabrasive bathtub cleaner or nylon scrub pad.
It is the simplest method at your disposal.
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.