On Mar 14, 11:01 pm, wrote:
On Wed, 14 Mar 2007 21:41:36 -0400, "Mortimer Schnerd, RN"

mschnerdatcarolina.rr.com wrote:
Now, I am curious about one thing: I clean the vinyl siding on my house the
same way with excellent results. I'm curious if using a bleach mixture might
keep the green crap from coming back as quickly? I don't think I should have to
do this every year.

I bet a sealer will stop the green crap. As long as the siding traps s
tiny bit of moisture it will turn green

The green crap comes from lack of uv light from the sun to kill it.
Meaning it's on the north side of the house and/or the result of a lot
of shade.