Could hardly be worse than Berlingo over the last couple of weeks since its last bath. Today I was ashamed to park it alongside a fifteen year old but reasonably fit looking Land Rover. So as soon as I got home I dedicated half an hour to bringing the machine to an acceptable standard. That waterless stuff is effortless and shifts some pretty horrible muck quite quickly. Just spray a panel, say a door, then the adjacent panel. Go back and polish off the first panel. Spray over a third panel then polish off panel two etc etc. you don’t need to drench the paintwork to make a fine difference. Four or five squirts is usually all I use. Then polish off turning the cloth often and use a new / clean one on each half of the car - I’ve never yet scratched the surface - the dirt seems to just float off. Finally go back over the car with a clean cloth and perhaps another slight mist of the polish.
I think my poor old arms took longer to clean the inside of the windscreen than cleaning the whole car.
No hose, mit or sponge was used - truly waterless