Change the syle of lock. I have one of those that twist. You put it one way and flip the other end over it and then twist the thing to lock it. When I go into the coop I make sure it's twisted into the lock position so the other part can't come over and thngs accidently lock me in. It would be hours most afternoons before anyone would be home to look for me and with Peanut sleeping she wouldn't worry either. I also try to carry the phone with me but, sometimes I forget it.