I have some of the older windows/screens in my porch with those plastic slider things that when you lift the window, they fit in the notch in the frame to keep the window up. Anyway, they are mostly rotted and don't fit tight, and I found some brand new ones, but don't know how that little spring stays in and keeps tension. Does anyone know? It must be something simple, but I can't figure it out! Thanks for any help you can give me!