can you go out with another cleaner for half a day and observe
aqua adapter will save you money in terms of water, weight might be a issue
fan jets are imo better,bigger coverage on the glass means you rinse less and i tend to find you work faster
what flow rate are you on? trying lowering a few degrees
do you switch the water off when cleaning upstairs sills or leave it on
5 cm distance when rinsing? i would reconsider that especially on regular maintenance cleans
DO YOU HAVE O.C.D? maybe your over doing it
practice on your own glass