I've tried many snow foams, but the best for cleaning that I have found (and that's what it's for, NOT just to look good) is Autosmart Actimousse XLS
I have that as well but no over impressed tbh seems to strip wax ect even on a small dilution don't mind using it for work van that needs doing 1 a week cos i have loads of it if any one wants some to try then give me a shout sure we can sort something out :)