Push it from front to back. If the forehead shows, it's too loose 3. Always keep your doors and windows locked even if you will only be gone for a short time. Exterior doors should have minimum one-inch deadbolt locks. Never leave a house key under a doormat, in a flower pot or on a ledge.
Burglars know where to look.
If you have recently moved or if someone has moved out of your house, change all the locks. Be selective when giving keys to others. Be generous with outdoor lighting. Both indoor and outdoor lighting that is light-activated makes it more difficult for the burglar to know it is automatic. Mark all valuables with your California driver's license number.