Pure water · water-fed pole
Window cleaning
Purified water and a pole from the ground — no ladders leaning on your house, no boots in the borders, and no need for you to be in.
The frames, the sills and the doors get done as part of the job. Not as an extra, not if you ask nicely. As part of the job. Half the reason windows look grubby a fortnight later is that nobody touched the frames.