Kill all detached screen sessions

Question

When I execute screen -ls, I see the following. How can I kill all the detached sessions?

There are screens on:

    84918.tty         


        

Answer 1

screen -ls | grep pts | cut -d. -f1 | awk '{print $1}' | xargs kill

Kill only Detached screen sessions (credit @schatten):

screen -ls | grep Detached | cut -d. -f1 | awk '{print $1}' | xargs kill