How to open a window....

[THT]

In my new house, I have a skylight/window in the roof of the bathroom.
Its the only window in there and therefore must be opened at some point to let the room air etc.

Now, its too high up for anyone to reach, and also has an arm to lock it open in a position.
Any ideas on how I can open and close this easily without getting the ladder everytime?

 

[THT]

The issue with a hook is that when the arms locks down into the teeth, it takes a lot of force. I think unclipping it would be easy, but then when you wanted to reclip it down, not sure a pole (long thing, not person from poland) would be appropriate

 

[THT]

its not a student house and your right lead head just gets cold