I used a product made by what WAS Johnson Wax Professional (now Diversey) called GP Forward. I used a soft largish sponge, popped the top, started at the front, scrubbed gently, and finished by stroking front to back for an even appearance. Came out quite clean and smelled very good (clean and not chemical odor).  

If you have fried food inside your van, you may need to pretreat with a degreaser (I've made it an absolute rule to NEVER fry inside, and after a half million miles, I'm very glad I did). Palmolive or Dawn dish detergents are pretty effective degreasers, but need to be thoroughly rinsed as they leave a gummy residue that attracts and holds dirt. You can rinse the degreaser while applying the general purpose cleaner. 

Karl Wolz
Sent from my electronic umbilicus

> On Apr 6, 2014, at 9:55 AM, turbowesty <turbowesty@GMAIL.COM> wrote:
> 
> I’m about to clean the inside of the pop-top and would appreciate any suggestions on what solutions / compounds / tricks people have up their sleeves for this… 
> 
> And no, the Bell Industries’ power washer method isn’t an option, it’s still attached to the Vanagon :) 
> 
> Regards, Peter Kraiker
> nextchapter.kraikerphoto.com
> Toronto, ON, Canada
> '82 L Westfalia 1.9 TD 5 Spd (Babe)