Ive been wfp cleaning for 6 months now and its going great using home made trolleys. I noticed everyday i work the odd house or houses have hydrophobic glass varrying in degrees of hydrophobia. I thought after a few cleans it might sort of get better some how but it seems the same and im Starting to remember which houses are like it. So how do u clean these? Im having a whale of a time cleaning glass that wateralls and i know they are drying close to perfect, but i can see on the hydrophobic panes that there is lines of dots of dirt that even when i scrub with the brush doesnt want to move yet alone rinse. So there must be some special tricks to doing this glass? Ive not had any complaints about it yet but i like to do my job well and it annoys me that i cant get them to the high standard, ive been sort of turning a blind eye to it i guess.