In the back of my insert, on the top,there is a metal dowel looking thing that used to be hanging down out of the hole it is in. Now I just looked after I reloaded and it is not hanging out by much now, almost ready to fall in behind the hole. When I get the insert cool enough I will try to reach and pull it back out. Anyway what is this for? And if it does fall, what concern should I have? Is there a way to fasten it so it does not do this again? Thank you for all your ideas in advance!