Is waterless caravan cleaning any good?

Don’t be so sure 🤣🤣🤣🤣

I note the limitations in terms of club rules which seem sensible. I suspect that caravans and motorhomes may need some washing of windows on site to facilitate a view to the rear (whether to the rear via a rear view mirror or to the front through the windscreen of the tow- car or motor caravan although in some cases a direct view to the rear will not be possible). In addition there is a legal obligation to keep number plates clean and lights and indicators likewise need cleaning. 

However my personal view is that I would never use waterless products because if there is insufficient liquid to wash away grit and other abrasive material scratching (however mild) to the surface being cleaned is inevitable and will eventually become a problem. This is especially the case on glass or "plastic" windows and in the latter case it is best to use a dedicated product. Likewise I would never use household detergent. Having gone to considerable effort to wax a van on a thoroughly clean surface why would you use detergent to break down that protective coat ?