I do a large Housing Association contract where all the windows are pvc and nice to do with the pole i`ve given them about 4-5 cleans wfp and the results are good,but i`ve noticed today that quiet a few of the windows that i was about to do had 2-3" of spots at the bottom of the glass.The rest of the glass was perfect and i always scrub and rinse well especially this part of the window,it`s weird the glass sheets and then beads up at this 2-3" at the bottom of the glass does anyone else have this same problem and if so whats the best way to get round it,please don`t say rinse rinse rinse cos i`ve already tried that.