About ten years ago I tried to clean my own windows.
I was a squaddie in Northern Ireland at the time, living 'behind the wire' in an army married quarter; we couldn't get a window cleaner for security reasons.
So I borrowed a set of ladders from a neighbor and tried to do my own. Firstly I was terrified; I didn't realise that using a ladder could be so scary, especially when you don't have a clue how to use one; and secondly I used Windolene to clean them with, and that's a pain in the arse!
From then on, when-ever I could, I always had a window cleaner; until I became one myself!
I'd like one now; it's a pain cleaning your own windows; but Wor Lass reckons that would be daft!