Convertible top cleaner

What is the best top cleaner? Does anyone have any idea what kind of cloth I should use?

What works for me

On my car I wash the top with "ragtop cleaner, use a very soft brush to clean it, let it dry and then coat it with ragtop protectant. I do it twice a year. Also, if it is dusty or has a lot of dirt on it I'll use a lint roller to clean it before I lower it and have all the stuff wind up in the storage bay.

Here's the link:

Top of the Line Auto Detailing Supplies" <orderstatus@cox-internet.com>(through Yahoo! Store Order System

I'm partial to the "303" brand cleaner and protectant. I think they are as good as Raggtop and less expensive to boot...