Rain guarantee my customers wouldn’t give a damn about that in the main they don’t want to see you cleaning windows when rain is running down the glass as you clean them end of,rain guarantee lol.
I cleaned mine yesterday with hot water today they are dirty again,it’s not the fact that this happens it’s the fact that the news is talking about nothing else so it could be classed as taking the wee wee.
It can be pouring with rain at 8am and then bright summer like sunshine at 9 at that point people don’t think bad of you when you turn up because you didn’t take the mickey at 8am when it was lashing it down,it’s human nature on their part and common sense on yours.