You can pressure wash, but if you have a vinyl fence make sure you're not using too much pressure as you don't want to damage the fence. You could use one of those car wash tools and some dawn with warm water and wash it like a car. Vinegar works really well with mildew/ moss as well and then you can just hose it down regularly
These questions go out to the public, and may or may not also be read by the company itself. I have used an oxy cleaner with a small broom, with perfect success.
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