For the rear window, I use two Meguiair's products that work beautifully, 'Clear plastic cleaner' no. 17 and another one, a polish, which I don't happen to have handy here. But if you search older posts, I think the number must be there somewhere.
I use the high-pressure 'thing' at the car wash to clean out the tops on both my Volvo C70 convertible as well as the Pagoda. This seems to clean the canvas very well and for sure will remove residual soap.