[Freeswitch-users] getting rid of hanging sessions?

in my testing, I'm getting some sessions that are, hung, I guess. Status shows: UP 0 years, 0 days, 2 hours, 7 minutes, 37 seconds, 752 milliseconds, 720 microseconds 23 session(s) since startup 5 session(s) 0/30 1000 session(s) max min idle cpu 0.00/0.00 if I do a shutdown, it waits on them for a while, then eventually shuts down. Is there any way to "clean" these up periodically? Or, what am I doing to leave them out there? thanks!