2000 Windstar SEL rear defroster clip broken

We discovered last winter that one of the "clips" on the rear window has come off thus rendering the entire rear defroster unable to work. We tried several things -- electrical tape, air conditioning tape. Our next step is cold solder. Has anyone ever fixed one of these? Talked to my mechanic and he was at a loss too. I don't want to put a lot of money into it -- but would like to know if anyone has any ideas. Thanks! :sunglasse