I've a few like this. I'm afraid - the big softy I am - I get my ladders off and clean them traditionally!
I'd love to drop these jobs, but the customers are so nice and I do all around them anyway, (moan whinge etc).
The bottom line is, I haven't the 'gonads' to clean a 1st floor flat with a WFP when I don't clean the ground floor flat beneath it.
Am I being too soft!