To be perfectly honest you need ladder training, make no mistake what you are doing is totally unsafe.
Contact David or Andy at Impact43 and do yourself a favour, get trained as that ladder will go higher and make the job easier.
Would you mind If I copy the picture and send it to the H&S and seek their advice as to what they think?
This is the type of action that gives window cleaners a bad name.
Shame on you

I do like the quality of the picture though and I might get a rogue trader section on my website and add you to it
And please, please, please tell me you don't really use windowlene :
