A friend of mine shared this experience. They entered a new rental apartment. After staying in for a few days, her roommate felt uneasy and kept getting nightmares.
So my friend decided to say a prayer and placed 4 green scapulars on all the four walls of the room. On the next day, they went back to the apartment and found a strange marking on the floor near the bedroom door. There was a claw-like marking on the floor.
It looks more like some demon was forced to get out of the apartment after they placed the blessed scapular in the four directions of the apartment. Through the intercession of Mother Mary and the sacramental (green scapular), my friend's place was freed from the demon.