What's the best method of cleaning the green stuff offmy vinyl siding?

It will power wash off. Then apply a mildewcide to stop it from coming back.

Use Wet and Forget ,safe for all surfaces and no labor.

30 Second cleaner. Used it on a grungy camper van and it cleaned up like new.

Power wash and mildewcide is your best bet.

Home depot has a mixture, sorry it has been years since we used it. Anyway you attach sprayer to hide and cover the siding leave it on for recommended time and use hose to rinse. Talk about clean and easy.

Word above. "Hide". Is hose. Kindle fire has a mind of its own.

I found it! Called Mold Armor, Home Depot, $8.97 for 56 oz. Comes in a ready spray bottle to attach to hose. Really works.

Borax is a natural mineral compound that won't damage nearby landscaping plants. Apply the solution as instructed above. Treat stains with oxygen bleach paste. To treat a stubborn stain, mix just enough warm water with a small amount of powdered oxygen bleach to make a paste.

Borax is a natural mineral compound that won't damage nearby landscaping plants. Apply the solution as instructed above. Treat stains with oxygen bleach paste. To treat a stubborn stain, mix just enough warm water with a small amount of powdered oxygen bleach to make a paste.