hi , im after a bit of advice . After buying some of the new fan jets of gardiners and replacing standard jet 's in a gardiners dt brush , i removed the middle row of bristles to allow the fan to spread across the brush without hitting any bristles. i have tried fan jets before but always give up when i start lifting off because that defeats the object and im no quicker, so today i have cleaned my house without lifting brush off with my varistream set to 70 and the results werent to bad but i still got some spotting and a couple of runs,
what am i doing wrong?
thanks for the advice 
runs is this from top of glass/frames sill or from frame only ?
and I know stupid quesion but was the brush clean ?
how long have you been water fedpole for also ?
spotting is normally caused by not scrubing enough allowing water to leech to it, or not rinsing enough, tends to be 79%

rinsing not enough or poorly (sorry could not resist Matt)