This morning I found out someone broke into my car and stole some low value junk I had in my glovebox along with a jacket and other stuff. I was home all along and didn’t hear it happening. I am usually one to check twice that the car locks when I leave it, and if for whatever reason I don’t then it auto locks after a while.

Now I’m a bit clueless with this stuff so I’m wondering 1) how they opened it without triggering the alarm and 2) can I do anything to prevent this from happening again? Any contraption/device I can use ?

TIA