[pawelmi]

While most of those advices (or rather tricks like go around or hire replacement and ask to train them) would work sometimes, they lack empathy and reproduceability. In fact might even be counter effective. From my experience it works best to build good relation, give honest feedback and ask for reasons of bad behaviour. It might be because of some factor that we do not know or control (eg someone has problems at home, has different understanding of their role, are not aware of the scale of effect of their actions). Only after, if it won't improve, clear boundaries should be shown, which when overstepped would result in well defined consequences. If behaviour is noxious to the team, it is much better to let offender go early on clear notice, not as results of playing some psychological ticks on them.