I have a 17-year old Andersen vinyl clad casement window that the lumber yard says is apparently rotted, and they don't know how to fix it. Is there something I can inject into the vinyl, or is there a way to cut out the vinyl, replace the wood, and glue the vinyl back? The bad spot is at the lower hinge of a large (5 ft tall) window. My neighbor has the same thing, and it looks like I have a second one about to do the same thing. It must be a common problem. Ideas?