Ho long is the pole attached? I have a couple of industrial units with high glass towers where the stairs is. I normally use ladders and squeegees but tbh it is a bit of a ball ache navigating a heavy ladder around the stairs and moving them every time someone wants to use the stairs.
Do you reckon the customers would be happy with the quality? There is normally just a light coating off dust on the windows when I do them every 6 months.