[Clever Forum Name]

I used this brush in last storms we had.

http://gardinerpolesystems.co.uk/all-products/water-fed-poles/brushes/super-lite-radius-sill-brushes/the-super-lite-radius-sill-brush-single-trim-flocked-bristles.html

It's out of stock at the moment. But it easily deals with getting rid of black grit and dirt. Not much use on bee spots or even bird poo TBH. But been flying recently through my work. Or is that because of the wind 

[Dave Willis]

Probably best to use a yard brush.

[SeanK]

During storms a toothbrush for when I hop out of bed around dinner time, after storms an Xtreme.

[Smurf]

Probably best to use a yard brush.

 

Anyway surely all rain washes the muck off windows anyway after all its pure water   
That's if the house is still standing and/or not flooded as the last thing a customer would want is a window cleaner