A lot of window cleaners won't go up ladders now as they can't get insurance - so use a long pole and hose. A window cleaner in my old village had a fall and had to be airlifted to hospital! I have my very own window cleaner (OH) - as he fits them for a living he's got some good cleaning products for windows and frames, and if I can persuade him, he does them once a month for me. I hate cleaning windows but I do the insides - still use vinegar and newspaper for a super shine
Our window cleaners have been today LL, and use the method 6herry mentioned, brilliant shiny windows when they leave, and they wash the white paintwork and window sills too, great value. I close my kitchen blind and bathroom curtains, I like one but his brother gives me the creeps, no idea why, just a feeling, they come every six weeks.
Ours comes approximately ever three weeks, I also pay the to wash all the upvc frames. The frames are always left dry, no streaking or smears on the Windows. They seem to make a point of not looking through the window. We pay £12.
Never drive faster than your guardian angel can fly.
Our business sells the equipment and resins to window cleaners (part of our business anyway - we specialise in water purification). There are few window cleaners who are willing to climb ladders these days. With good reason. Have heard of too many falling off ladders and breaking their backs! It's better for house owners too. No more peering in windows and lovely shiny windows and trims.
The more you use them, the less your windows attract dirt. I'm an expert these days in wfp systems (sad) 😂