Though you may be stuck with a few black speckles for a while here s how you can keep the fungus from shooting any more spores at your house.
How to remove fly specks from vinyl siding.
I would use something like jomax siding cleaner and a pressure washer light stroke.
Vinyl siding is very popular due to its durability and simple maintenance.
Remove insect stains from vinyl siding with simple cleaners.
Combine equal amounts of white vinegar and water in a bowl or spray bottle.
Steps to remove the spots.
If using a bowl wring out the paper towel so it s not dripping.
Test the solution on a small hidden area of the surface first if needed to be sure it is safe such as for a painted wall.
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Use big pieces of pine bark or other bark mulch which are a less hospitable place for the fungus.
Apply the jomax with a pump up sprayer let is set a minute then pressure wash or brush it in and use a hose to rinse it down.
Insect stains and other debris can be removed by simply cleaning vinyl siding with household cleaners.
Peroxide hydrogen peroxide has also been said to work especially at higher strengths.
This will buy you a year before the fungus reaches to the top of the new mulch.
Apply it allow it to bubble and then brush it off with a wet scrub brush or sponge.
Add a fresh layer of mulch.