I’ve used bleach-water on the vinyl siding and it’s been the only thing that
helped at all (still took some pretty good scrubbing)...
Had an estimated 100 plus spots per square foot. A high pressure sprayer,
bristle brush, plastic pot scrubber, and strong (vinyl safe) cleaners had no
effect on the spots. A sharpened bamboo chop stick was the best tool we found
for removing the spots. A sponge and detergent would then clean off the
The last thing we had done was to paint over the spores that were on the
aluminum trim using oil-based paint and to have a few screens re-screened.
Couldn’t be removed with a brush and if picked off with a fingernail left a
brown stain); called a power washing company, described the situation and they
told her it was Artillery Fungus and they wouldn't even take our money because
it was virtually impossible to get off.
I have started using an ink eraser on the spots. It does leave a smudge, but
takes out the stain completely. I am going to try car wax to even out the
Labor intensive. I used a sponge with Simple Green on it (full strength is
good) and in the other hand you take an INK eraser and you erase it, adding some
Simple Green every few strokes. It removes it completely, then you buff the
siding hard to remove any eraser smudges.
Only way that I have defeated the fungus is to wash the walls with "outside
clorox" along with a brillo pad. It is not a sure cure.
Had one product that has recently helped me in cleaning off the spots left
by the artillery fungus. It's called 'Pro-Tek Chemical' and when mixed in about
a 10-1 solution of water ( and while using some small bristled type pad &
elbow grease) I have been able to remove much of the worst of it. While I have
just started using it, I cannot say what (if any) long term negative outcomes
might be on my white siding.
Within a week or two after landing, the spores may be emulsified with soapy
water or removed with mineral spirits.
I have heard that a product called Jomax and bleach may work.
I've tried to get the spots off the surfaces and they don't really
I am able to remove the "spots" on the windows with a drywall putty knife
and some soapy water. We have casement windows, so the fungus that is on the
"white" vinyl casement around the window is the worse. Our siding is a wood
grain tan color, so it does not show as bad.
Here is a solution we recommend for removing the black spots:
1/2 cup detergent (Tide, for example)
2/3 cup trisodium phosphate (Soilax, for example)
1 quart 5% sodium hypochlorite (Chlorox, for example)
3 quarts water
We suggest applying this solution with a soft
bristled brush and removing with water.
Beforehand we tried to remove the black spots with a power washer but to no
avail. A year passed by and the condition grew worse. I tried steel-wool, but
that really didn't do much. My wife tried a green Brillo pad and water. That had
some noticeable affect but seemed to take a lot of scrubbing. Then, I tried Mr.
Clean Magic Eraser out on the siding and with very little effort the spots came
right off. I tried it on all three sides of the house and it removed every bit
of it from the areas I applied the pad. Our vinyl siding has texturing to it,
and so it was surprising to see how easy the spots were taken off with the Mr.
Clean product. So ecstatic was I that I kept wiping away the spots within arms
reach until the pad was depleted.
Each spring I take a plastic scraper and remove all the spots I can find,
then wash the siding with Clorox Cleanup. It's time consuming and a pain staking
process, but I manage to remove 98-99% of the spots, with a thin outer circle
When my husband noticed it I went to action right away- the Mr. Clean
sponges work really well and I have been able to get the majority of it off of
our bay window, screens and door. Of course this is only feasible because it is
not as severe as in the past and the rest of the house is brick, but thought you
might want to pass this along. It removes the entire spot and doesn't
I have two gardens in the front of the house off the foundation. One side
has pure peat moss and the other a wood/bark mulch. Surprisingly, the siding on
the peat side has no spotting on the siding! This may be a solution to the
problem. Possibly peat inhibits fungus growth.The only downside is
From DDDavis: "This is interesting, since many mosses including
peat moss specifically are often anti-microbial, even being used in the old days
for wound dressings in wartime!"
We are having some success with one home with vinyl siding... have been
soaking with cleaning solution called power house butyl degreaser and hand
brushing, then rinsing. Although there is still a light stain [approx. 75% of
the stain is gone], it seems to fade as it dries.
We just got vinyl siding on our home...Alcoa's latest. I noticed the black
dots this spring but wasn't surprised as my neighbors have been fighting them on
their white vinyl pool fence for years. "Eagle 1 all around [automobile] wheel
cleaner" took the dots off of the house siding fairly quickly...with my wheel
brush...the cleaner is listed for painted or clear coated wheels. There doesn't
seem to be any etching. The dot's have only been there since this spring...We've
also used the magic eraser sponges from QVC on the neighbors pool fence but it
takes some elbow grease.
Live in new condo area. Artillery fungus a very big problem. Believe it or
not, used Simple Green, a spray cleaner used for cleaning cars and tools. Tried
it on siding. Takes off dark residue and doesn't leave stain. Seems to have no
effect on siding.
Here is an interesting one: "I am a tenth grade student attending
Battlefield High School in Gainesville, Virginia. Through much experimentation
in an independent research project I have found the cure to the pestering
peridiole problem. Are you interested to learn of my results? I replied,“Yes”and
she sent the following abstract and
full report). And, I have received email from people who tried her suggestions,
and they said it worked great!!!
Just a quick note of thanks for your page on this blight to mankind that has
cost me many hours of scrubbing of my cars and siding. Of particular usefulness
was the link describing the experiments of the 10th grader in Virginia. Don't
know if curiosity got the better of you and you actually tried her
recommendations, but if not I can say the kid knows what she's talking about!
Following the 2-step process, the spots literally wipe right off. My fingertips
and nails are saved!
There are hundreds of articles on-line saying you can't get the spots off.
But, The kids method works! We did refine it a little by replacing the
toothpaste with the Mr. Clean Magic eraser. It's a breeze. We wet a paper towel
with mouthwash, wiped down the spots until they softened and wiped off (6-7
swipes did it) and went over the stain with the Magic eraser. The spots were
The only solution that I have found to remove the fungus is Soft Scrub
cleaner with bleach.....and lots of elbow grease! The fungus attaches to our
windows, front door, siding along the farmer's front porch and the porch
rockers. I think we will resort to stone, peat mulch, or pachysandra next year
as it takes days to scrape off the fungus each year. I am going to try the
Scope and toothpaste idea this year. Will let you know how it works. Thank
goodness we park our cars inside......I never thought of it attacking
I have removed all of the infested mulch already, and I am looking forward
to putting something down that will not be prone to growth of the artillery
My current plan is to remove the mulch and replace it with small rocks. The
time consuming job is to remove the dots. I tried the mouthwash and Mr. Clean
Magic Eraser technique and that does work.
After looking at the blight on my aluminum siding for years, I decided to do
a little research on the internet and stumbled across your web site FAQs on
Artillery Fungus. I've tried many cleaners, but it mostly came down to a lot of
elbow grease. Tonight I decided to try a Mr. Clean Magic Eraser. I was so
excited that I called my wife and kids out to take a look at how easily it
removed the spores and stains. Within a matter of minutes I had the front of my
house clean. If we can't get rid of it, we may as well learn to live with it.
This certainly makes it manageable.
Thanks for the article regarding artillery fungus and how to remove the
spores from vinyl siding. My husband and I tried everything in the house to try
and remove the spores. Acetone did work in conjunction with a Mr. Clean Magic
eraser (the extra strength one). But to our surprise, we found by accident that
if you sprayed the area with Easy Off oven cleanser and let it set for 5 to 10
minutes, it came off a lot easier. The oven cleaner acted like it would normally
in an oven. I did first scrape off the spore with either my fingernail or a
plastic scraper. Then I applied the oven cleaner. Let it set on the spores for a
few minutes, then using the Mr. Clean Magic eraser was able to remove most of
the spore. It did leave a small red dot, but it is faint, and we are hoping the
sun will eventually fade he red stain over time. Hope this will help others
(I tried) bleach, stripper, M1, acetone, mineral spirits, gasoline, a
prespray of fungicide and nothing worked. What I did find upon alot of research
and finding your site was MAGIC ERASER! I presprayed my siding the evening
before with a mixture of clorox bleach and M1 mildew aide and let it sit until
morning… The next morning I started scrubbing with a tad bit of water and Magic
Eraser and amazingly almost every stain came off. I did find that the earlier
you do this the better! This fungus had went approximately 12-15 feet up from
the ground. Now, my siding is fairly spotless again and I hope that this
information will help assist people so that they will not buy chemicals that do
not work! MAGIC ERASER AND ELBOW GREASE AS SOON AS POSSIBLE!
The abstract by the 10th grade student in Virginia identified Cinnamon Ice
Scope mouthwash. I could not find this in my local stores, but we had some
Walgreen's Spring Mint antiseptic mouthwash. It worked well, after allowing it
to penetrate for about 5-10 minutes. Using a heavy-duty Mr. Clean Magic
Eraser and mild rubbing for 15 - 20 seconds removed the stain effectively.
Your background, FAQ and readers' suggestions have been helpful. We live in
CT, have used a pine mulch for years but this is the first year (2010) we
noticed the fungus, probably just missed it in the past. We tried most of the
suggested solutions without success. Today we tried a product called ECO ORANGE,
produced by PRO-TEK Chemicals... [at a] 10:1 ratio and that took off most of the
spots with limited scrubbing. We are just experimenting with it in small
secluded areas and giving it a few days to see if there are any after effects.
Thanks for your research and recommendations.
No one in our area [eastern Illinois] ever heard of this fungus.
Landscapers, lawn service, cleaning services, insurance provider, let me
rephrase that, insurance non-provider, knew what the black dots were. Yes we
removed all the mulch. We had a 15x25 flower garden area at our entrance, on the
North side of our home. We tried to burn it and what was left we buried. We had
obtained the mulch from a wood palate company in a town north of us. It was not
treated, and we thought that was why the fungus grew. We have scraped the soil
after removing the infested mulch, sprayed with a fungicide, for extra measure,
lay down a plastic barrier, and purchased treated cypress mulch. There are still
many many spores on the surrounding plants that make me very nervous.... I was
successful in removing the spores off the six large windows across the front of
our home. A large razor blade in a handle was convenient. I learned quickly not
to scrape in a vertical motion. All the spores popped off all over my hair, face
and down my t-shirt. Yuck!! Thanks again. I hope we can help others in their