How do you pop open a window screen.?

Question:ok, well yeah i sneak out at night and i need to get through my window, but i cant cause of my screen on my window. how can i get the screen part off with out messing it up?

Answers:
Oh we had the same problem we needed to clean out the window. There should be a thingy that you pull out and you hold onto and pull it up. On the top side of the window theres two springs that bounce. You pull on the handle and pull up and push out. It comes out clean.