Personally i think on the glass first floor and above trad will guarantee
results everytime but who wants to risk there lives on a ladder if
you dont have to.
The frames are definately cleaned better by wfp and is the main selling
point of the system,i cant count the amount of times that customers
have remarked on how the trad cleaner never did the frames,because
of this the overall effect of wfp is greater.
So why not combine both methods,my tap water is a little over 30ppm
so i dont ro or di anymore.I wfp windows and have a reach around
on top of the pole when finished i have a unger blue shower squeegee
(for lightnes) on the reach around,simple couple of straight pulls glass
is dry,works really well in winter when water sticks around longer.
The above is a little slower than straight wfp but still quicker than
trad if they were doing a proper job.
With WFT i pick work from crap wfp'ers and trad guys,i get all
the benefits of both methods and none of the negatives