I would try a product called wet forget outdoor i think i initially read about this product here on home tallk.
What are the black spots on my outdoor patio carpet.
Fortunately mold and mildew are easy to clean up.
It can be more than unsightly.
Green stains clean up in 1 2 weeks black stains and moss clean up within a few months.
In the spring of 2014 we tried it for the first time on the vinyl siding on our daughter s house and our concrete patio.
Resistant to staining and uv damage the elevations resistant to staining and uv damage the elevations carpet is a great fit for either indoor or outdoor spaces.
Get free shipping on qualified black outdoor carpet or buy online pick up in store today in the flooring department.
That being said outdoor carpet is an ideal place for mold moss and mildew to attach themselves.
It is constructed of a pet fiber made with up to 100 recycled post consumer purified plastic bottles and offers superior wear and fade resilience even in direct sunlight.
Wet and forget is as simple as spraying your outdoor surface and forgetting it.
The mossy green slime can deteriorate an outdoor carpet if not removed properly.
Green algae black mold and moss begin to die off on contact.
Looks like little spots of mold mildew to me.
It can be unsanitary as well.