Go to Lowes or Home Depot and get a gallon of Jomax and a couple gallons of bleach. Jomax: »www.rustoleum.com/CBGProduct.asp ··· ?pid=333
Mix 1 1/2 cups of Jomax and 4 1/2 cups of bleach into a 2 gallon pump-up sprayer and fill with tap water up to the 2 gallon mark on the sprayer. Spray on, covering the area/s generously. Wait 15 minutes or so, then rinse off with garden hose.
It works very well on the vinyl siding and aluminum eaves on my home and wipes out mold, mildew and algae. No pressure washer needed...--