windows still dirty

[Iron Giant]

It never entered my head that you could not use tap water so i've learned something there. But i am not giving up i'm sure i can get better results with perseverance. i will keep listening and learning that's all i can do.

With respect perseverance won't help you get better results, if you are adamant on ditching the ladders and using just water then you will need not to use tap water, otherwise potentially you could cause hard water staining on the glass which will be another headache you will have to get up ladder to sort out,

You need pure water which is 000ppm reading on a tds meter, your tap water could be 200-300+ ppm, to achieve this you will need spend £100's on equipment to produce pure water, as mentioned above if you are adamant on no longer using ladders, then call a professional window cleaner who has invested £1,000's into their business and will provide a professional regular service. 

With respect this is a forum for professional window cleaner's working within our industry, people are welcome to come on here and ask question's, I believe your question has now being fully answered, how you chose to proceed is up to you. ?