Securing metal shaft into metal housing
I've taken apart my Sonicare toothbrush to fix a loose connection and see that the straight metal shaft has completely dislodged from the metal housing piece. It can be reinserted, but is not secure, and thus slips out. How can I ensure a tight fit before reassembling? I'm not sure if the original was one piece and mine is simply broken, or if some sort of glue bond has been compromised. Thanks!