instructions for getting rid of multiple screen sessions

ctrl-a crtl-d will detach the session you are currently attached to
do it twice to make sure you aren't inside screen twice
then do a screen -ls
this will list the current screen sessions
then enter screen -R
this will attach to the first screen session it can find
once there, exit all programs until there are no more screen windows left; this will end the first screen session
repeat once more from screen -R for the second session
at that point, you should have no more screen sessions running. do screen -ls again to make sure
as an alternative to stepping through each program and window, if you feel confident you won't lose any data, you can type ctrl-A ctrl-\ to terminate the programs and screen immediately