Clean the frames thoroughly,especially the top,then rinse them,do this on all the top windows BEFORE you clean the glass.By the time you have finished rinsing the last window,the first one should have stopped dripping from the top of the frame. Then do just the glass. Then repeat the process for the bottom windows. DO THIS ON YOUR 1ST CLEAN ONLY. 2nd cleans,wash and rinse top of frame then glass each window.A tip for you is change over to wfp gradually.i.e. do a handful of jobs wfp each day, then trad the rest,or you will find you get miles behind as 1st cleans require alot of time. Each week gradually increase the amount of wfp work you do. Also wfp can react with crap paintwork on wood frames.Test the paint by wetting your finger,then rub the window frame firmly,if there is paint residue on your finger then its better to trad them as you could end up with really bad spotting