One of the windows in my house has become very loose. This is a double hung window, and the lower sash wants to fall inward. It seems the rails on the side (not sure what they are called) are too far out, leaving slop. Are these adjustable? There are these wedges at the top, not sure if there is some sort or adjustment underneath. If I push on the side rail, it has some give. This window houses an AC unit that is well-supported with a bracket. But I wonder if the vibrations over the years have caused this. Thoughts?
