Clean the area with a solution of one part bleach to four parts water.
How do you clean house siding.
Even after pressure washing you may still find that a thin layer of dirt remains on the siding.
The cloth will likely come up dark gray with a layer of fine soot.
Check the packaging to make sure the soap is safe for siding windows and sidewalks.
If you are.
For a stronger solution mix together one third cup powdered laundry detergent two thirds cup powdered household.
Repainting the patch to match your siding will be up to you.
As an experiment rub a clean white cloth across the unwashed siding.
Stubborn black spotty stains are probably mildew.
Start at the bottom to avoid streaking and use your garden hose to rinse off each section before it dries.
Basic vinyl siding cleaning apply the vinyl siding cleaning solution with a soft bristle cleaning brush scrubbing the full length of each lap.
Always hold the pressure wand 3 feet from the surface to start and move closer to 1 foot as you watch how much.
To pressure clean the higher up areas you will want to use an extension wand because you want to avoid using a ladder with a pressure cleaner.
Install the soap tip to the end of your pressure washing wand.
Dab the area with a little diluted bleach if the black disappears it s mildew.
But over the years your house will experience paint failure faster than if it were applied to clean siding.
What you need to clean vinyl siding store bought vinyl siding cleaning products clorox windex lysol etc soft cloth long handled soft bristle brush hose buckets of water pressure washer optional.
Use a bleach cleaning solution.
Homemade mold cleaning recipe for siding cup trisodium phosphate tsp cup powdered laundry detergent 1 quart household chlorine bleach 1 gallon water.
Mix 30 white vinegar with 70 water for an all purpose cleaner that will get rid of light mold and mildew stains on your siding.
Wear eye protection and protect plants from splashes.
Pour multi use soap that is formulated for pressure washers into the reservoir.
Get the details right.
Then to pressure wash the house siding clean use either the 25 or 40 degree nozzle tip.