My 6105 stream had become seized up with caco3 build up. When I removed the impeller the titanium Rod came out with it. I know this is supposed to be fixed. However After cleaning I replaced all the parts and it Seem to be working well again. I am not sure whether I should have glued the rod in but I just pushed it in. Should I glue it in and if so what glue should I use? The unit is around 2 years old so and I am not sure if it is still under warranty.