Here's how I do it for Captured the ghost:
1. Bring a thermometer, audio recorder, and EMF reader. Then, find ghost room. If the temperature in the room drops drastically (go back in and out to confirm), it's definitely a haunted room. Or, you can ask a site assistant to find ghost room.
2. Second, search for the ghost's belongings. Collect 7-8 items in different locations.
3. Once you've collected them, identify the ghost. Once you've found the right ghost, place the items in the cauldron.
4. Once you've found the ghost, a notification will appear, and you'll immediately see which ghost's items are glowing pink. Place them quickly. After that, she will fall as indicated by the notification.