Yes amazing isn't it.
They get awards for the building but the clever clogs who designed it didn't have the forsight to think.....Now how are we going to keep this looking clean.
And then wonder why they get quotes for hiddeous amounts of money.
I do a block of flats where the windows on the staircases have wooden planks across the fronts, so you can't get poles through them, and ladders are out of the question. Luckily most NOT ALL can be done from the inside by opening and bringing each window into the building.
I had a wonderful discussion with the designer who took pride in telling me the design got awards from The Times, he wasn't so smug when I asked him how are we supposed to clean those particular 6 panes of glass