Motion Sensor keeps going off
So I've had this motion sensor up and running about a week. .but the last two nights I have gotten false alarms. .I have a cat who is MAYBE 6lbs at most. My camera is pointing right at the thing and I can't for the life of me figure out what's setting it off. It's been 2 different times, first happened at 11:30PM, this one happened at 4:45AM. The cat was no where near it, there is no heat source by it, it's just the one sensor that does it. There are no lamps, no heaters, no electronics, absolutely nothing near it except my couch. Any have any ideas? Could the sensor itself be faulty?