Texas,
In the UK I don't think we have 'screens'. I think the lack of replies (although there's been a large number of 'looks'), indicate we're not sure what you mean.
Normally, here, we only clean the exterior of a window, but on occassions clean the insides.
Then normally we're faced by curtains (do you call them drapes?). Sometimes in offices/factory units/hairdressing salons we have the 'Venetian Blinds' which can be a right pain in the bottom to work around - but we don't clean them - even though they might be really dirty.
Honestly, we're really basic here. 'Window Cleaner' means 'Window Cleaner', and the only discussion here is whether a window frame should be cleaned with the window.
I think the British public in general, have a lowly view of window cleaners - in that we're drunks, unreliable and sometimes just plain burglars in disguise.
For me this stereo-typical image it's great - as I'm a slight cut above the public perception.
I like to give the impression that 'You mighn't think I'm great, but the devil you know is better than the devil you don't'.
This keeps my customers pretty loyal. I've only lost three in the past three months!
I'll send you some photo's of our normal work. Wait out!