Hi Darren
That's one of those Unger units isn't it.
What cleaning fluid do you use and what process do you go through to clean those windows. Whilst any imperfections won't be seen from the main lower seating area, they certainly will be seen by anyone in the rooms overlooking that seating area.
Do you use an initial pad to clean, then swop it for another to polish it off and if so, how effective is it?
We have the same green cleaning pads but the thinner microfiber pad don't work well polishing off.