have you recently had it tinted? sometimes when they cut the film they cut the bars by accident if so they should fix it. If not then bar what raging bull has tried you will prob need to replace winscreen however check all along the lines with an ammeter to make sure it aint something else
It is a metallic based glue....has metal in the glue stuff itself...you tape up where you DON"T want it to go...then carefully paint it on........joining up over the broken wires....almost as easy to just get a new set though........old one just scrapes off like a sticker.......not sure of price.....
You can buy a little bottle of conductive paint, but you'll need a series light or multi meter to find out where it's broken, then paint it on to join the wires.