Hi! My rather nice kettle has sprung a leak around one of the 'windows' on the side. Looking in from the top, its obvious that the leak is due to the gromet/frame around the 'window' coming away from the metal 'wall' of the kettle. I'm pretty sure that I can take it apart and get access to the faulty parts and that I could fix the problem with a suitable glue. But here's my question what glue can I use to stick plastic to metal that won't degrade when in boiling water and is non-toxic?