I've just taken on a new account. Its appartment blocks. That type of work isn't new to me i do quite a few. I cleaned the exteriors a day before i went to do the balcony cleans, when i done the balcony cleans i was suprised at the amount of sap/pollen/bee poo whatever you wanna call it. And it doesn't come off even with hand tools. You'd clean the window then see whats left, then have to go over with your nail, scraper , micro fibre whatever to remove the marks. With that in mind i knew its impossible with a wfp to remove these marks from the higher windows. So, just suck it up thats as much as you can do?
Anyone else come across this and how have you addressed it , just accept the limitations or found a work around ?