After you use your method of choice treat it with this mold inhibitor:
http://www.homedepot.com/p/ZEP-32-oz-Clear-Shell-Mold-and-Mildew-Inhibitor-Z
UCSM32/202711568

It's non-toxic (made from crab shells) and has worked for me for two years
in the (formerly) rainy Pacific Northwest.  I'll treat it again this year.
With no treatment my top grew mold the winter after I spent hours cleaning
it and had to do it all again.

I just cleaned my son's '87, but the top is off, and a soak in bleach (Tilex
is bleach BTW) followed by a safe biodegradable cleaner it's like new.  With
the top installed I've use straight bleach in a spray bottle several times
in the past, but I use a respirator and facemask with the entire interior
masked off with painter's plastic, including the canvas.  I then use a home
rug/upholstery cleaning machine to spray and suck off rinse water.

And yes, as Alistair mentioned, the flocking is tough but it can start
coming off with age, and it does prevent the condensation drip because it
absorbs moisture.  And that's why it grows mold.   Go Westy scrapes it out
and installs headlining material in the rigs they sell.

Stuart

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
Jeff Palmer
Sent: Sunday, June 07, 2015 4:02 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Cleaning pop top flocking?

Can someone remind me the best way to clean the underside of the fibreglass
top? It got a bit moist and water has discoloured it.

Thanks
Jeff

Sent from my iPhone=