this is starting to give me the hump. im on number 2 today and tryed pressure settings 7,8,9,a,b and it keeps slowing to a trickle (when you turn the brush on its side the jet is about 4" from the brush). Turn it to number 3 and it is on pressure setting 7 and its about 14" from the brush. my brush has 2x 2mm jets.