spring to hold up shoe

Sounds like you need a new balance. We may be able to help, but I'll need you to remove an undamaged version of your balance from the window and show me some clear photos of it. I specifically need to see the top end, bottom end, stamp, and whatever clip or hook is at the end of the cord (if applicable).

Just to reiterate, please make sure that the balance you show us is whole and undamaged. That will ensure that no important details are broken off and missing.