Intention, Garnet. See it as closing a door and send. If you know where it's at, visualize the place and send the energy towards it. If not, ask for St. Michael's help and send the intention that all who are using it go to the light and stay there, then see the door closing. It may take repeated tries. Anybody continues to show up at night use the same technique. Tell them to go and shut the door behind them.