Reading through the thread I'm seeing several products and would like some advice on which to get, cost of the product is irrelevant as a new top is much, much more and I'd rather invest in maintaining it than have to replace it:
Meguiar's G2016 Convertible Top Cleaner - 16 oz
- vs -
303 (30207) Multi-Surface Cleaner Trigger Sprayer, 32 Fl. oz
303 (30606) Fabric Guard Trigger Sprayer, 32 fl. oz.
- vs -
303 (30313-CSR) Aerospace Protectant Trigger Sprayer, 32 Fl. oz.
Not recommended for canvas/fabric
Also found this video, not sure about using a pressure washer, seems like a bad idea:
How to clean and protect your car's fabric convertible top by Auto Obsessed