Bungle is right, we need simple things to make us work 'better'.
For instance:
I use a ladies 'towel turban' (ladies use it to tie up their wet hair) the smaller version fits perfectly over a brush and is great for just finishing fascia, soffit and gutter cleans.
I cut down the bristles on a brush to about 5mm high. It's like a nail brush and will take the skin off your hand. Ideal for tough marks on glass or plastic.
I used elastic bands to connect a 'magic eraser pad' to a Gardiners quick loq socket. Dunk this in some pink stuff and will remove almost anything at 1st floor level. Black marks are gone!
All simple ideas, but they all make my day easier and more efficient.
Soon, I'll make a tool to get spiders crap out the top corners of the window frame on 1st floor. Especially on first cleans with rough render, over a connie, they are a bloody nightmare to come out.
It's the little things we need...