I've just invested in the 303 fabric cleaner which I used yesterday and it removed some stains I have had on the car since just after it was new. Some kind people walking down the road rubbed donner kebab and chips into the roof, and spent quite some time making sure the chips were well and truely mashed into the weave of my roof. As my car was just 2 weeks old I wasn't too happy. Whilst I had tried cleaning it I couldn't get the grease out and it had left lasting marks. After using the 303 cleaner in a diluted format it was much better. Although as a final hit I tried it in concentrated format on the worst effected area and it is now perfect.
I'm going to use the the 303 fabric protector on it this evening so it should all be perfect again from this point forward.
Well done 303 cleaning products