When the rattling of the plastic screen frame started driving me nuts I folded up and inserted a small piece (1"X1") of felt between the frame and window.  Stopped the rattling and squealing both.
Brent
http://www.weidefamily.net/vanagon/
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Date:    Wed, 8 Jun 2005 09:58:17 -0700
From:    Damon Campbell <damoncampbellvw@YAHOO.COM>
Subject: Re: A good lube for sliders

Oh yeah... thanks for jogging my memory.  I *DID* do
something with that knowledge - exactly what you
proposed below.

No good, the plastic just bows again.  It worked for
about a week, i think, before it was doing exactly the
same thing.  I was thinking of getting a little piece
of felt trim to clip over that edge.  The idea being
let it rub, just don't let it squeal.

--- Shawn Wright <swright@ZUIKO.SLS.BC.CA> wrote:

> You're right, in my case it is the screen scaping on
> the glass that makes the noise. I
> haven't done anything with it yet, but maybe just
> sanding the edge of the screen that
> contacts the glass will be enough.

'84 Westy "The Van" w/2.3L WBX
Vancouver, BC