Ghosts?
Here are some symptoms of a ghost-inhabited house.
Frequent light bulb changes. Electric items that seem to turn on and off by themselves. Appliances that seem to short circuit way too often. Unexplained noises…items moved without explanation. Temperature changes that are unexplained…etc. When something cannot be explained in a scientific way, that is the time to call in a space clearing expert to determine what is going on and to correct the situation.