try turning the flow down, wet the window then turn the flow off, scrub the wet window, then turn the flow back on to rinse. Now you have done the initial clean this is all it will need anyway.
roll up 2 microfibre cloths, and put one ontop of each door to "plug" the gap where the water is running down, i sometimes stuff microfibres in letter boxes if the water is going to run down inside.
you'll find you have a few houses probably with wooden frames where the windows leak too, usually with an fan light above an opener if there is no drip ledge on the fan light, i do as instructed above and usually it works, as for getting the ladders out avoid it at all costs, by the time you have done one or two windows trad upstairs you may aswell do the whole house trad IMO.
greg