Each window had 2 panes, one of those big panes and a small opener.
With the company who provides this work, I dont charge for travelling, they pay well, so I just take the rough with the smooth.
Anyway back to the dirty water, as you can imagine all the drips were black, so we were constantly wiping floor tiles, skirtings desks, you dont realise how much you drip until you see it all black.
We changed the water 6 times even though it needed doing after a couple, also used 24 cloths.