[Rogue Trader]

tap them shut or just clean them while they are open. Once you have been doing it a while you can be very accurate with your brush head. If they are sashes and you dont want to leave it then get the ladder off climb up and shut them (ive only actually done this once!)

[ascjim]

hi all i have come accross a few customers houses where they are out but have left there windows open what do you lot do??

Get in.Make a cup of tea.Search the kitchen for biscuits  

Best thing to do

[Paul Coleman]

hi all i have come accross a few customers houses where they are out but have left there windows open what do you lot do??

See if they've got a better TV set than me.

[Paul Coleman]

To make a point I like to poke the brush through the window, and aim the jets of water to initial my name on the wall !

I just clean but do glass only if there's a risk of squirting water into the house.  You can usually push them shut with the pole anyway.  Sashes may have to be closed manually.  Apart from that, it can be tricky if you have an open window below a pane and it won't push closed.  Generally, I just use a tiny dribble of water on the higher pane and wash glass only below it.

[GB Window Cleaning]

on the ones that are open push close with pole and leave he top frame that time simples

i do this too

[Johnny B]

In direct answer to OP's question, I clean them.

John

[Klean07]

like them open myself,gives you something to hold onto and go up another rung instead of streching 

Yawn Yawn. Those were the good old days.