i am really scared to say this...............but i have gone back to jets, sorry guys
I ordered a new extreme light brush from gardiner and for got to order fans with it anyway started using it and i found the extreme brush and jets to be brilliant.
On first cleans i very rarely get spotting i am not cleaning any more than i normally would, i have reduced the time on the glass for regular cleans.
I do have the pressure at around 40 and i find this good rate of flow really helps the speed..
It could be the brush but i dont think for now i will change back but as a precaution i have installed two red low pressure fans in to the brush in case i ever need to change say on a very large or hydrophobic glass