I use a window cleaner for the outsides and he uses a spring water pole system which dries very clear. For inside I use Method Window Cleaner and a microfibre cloth. Leaves a lovely finish.
I had the same problem with streaks and white marks on my windows after cleaning. I discovered the solution in an article on https://www.fortador-usa.com/blog/best-professional-window-cleaning-tools-window-cleaner-suppliers about professional window cleaning tools offered by window cleaner suppliers. There is also a lot of information on working with steam cleaners, which are extremely effective at cleaning windows. I recommend to take a look.
Sonia
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Sonia