This is how you do a first clean and get the best results....
1st check the frames to see if they are oxidised (they give off white powder on your wet finger) and have a look at the seals to see if they are black rubber on the outside of the glass if this is the case you will have to on the maintanace cleans clean all the windows and then go back to the first and rince 3-6 inches below the top frame, this will stop the drips that come out of them black rubbers for hours after you go (should stop doing this after about 3 cleans, normally soap residue)
right..... on a first clean to get 100% perfect result without scrubbing your arse off.
1. turn the flow on, nice high flow rate will be easier
2. scrub the frames on the window, really get in there turn the brush to get the angle and then rinse the frame.
3. rinse the top frame loads get all that dirt of of it, build up a (head of water) from that top seal and rince about 6 inches top
4.scrub the glass but only rinse about 6 inches from that top frame and leave the window wet and unrinsed
5. do this on all of the windows what your doing in letting the windows get a really good soaking
6. go back to the first window and scrub only the glass but start 6 inches below the top frame imagine that is the top, that is to stop any drips that you have missed and rinse from 6 inches down.
7. turn the brush off and brush the window cill, also on dirty first cleans you can put a towel over the brush head for further drying cleaning, just really on the first time