Do you have a sliding-glass door?
If so, you really should have a Charlie-bar on it.
Nope. And what in the world is a Charlie-bar?
It's a bar that comes down against the sliding-glass door to prevent from being able to slide open should the lock be unlocked/rendered disabled.
Some people "get by" without having one by placing a broom-stick or something in the track of the door which is less effective.
Charlie Bar