If I've been doing really filthy windows and leaves, old paint, cobwebs etc. get clogged then I will give it a good swirl around in a bucket of warm water & any soap (don't forget to rinse rinse rinse).
But for normal everyday use just let it dry naturally then give it a few whacks with your hand to dust it, thats all you need.
I think when most of us started wfp we thought we were surgeons working with sterilised instruments, but after a while we remembered we are only window cleaners!
