I remember a pattern of occasions from about 15 years ago, in which my car (in a carport) kept getting broken into, but part of the problem was that I had continued to forget to hit the lock on the alarm key.. so the fact of the matter was that it kept getting broken into by mere handle testing of some passerby.. and I am not even sure if it was the same person.. but I am sure that there were some occasions in which not too many valuables were taken, and there were other occasions in which I was saying "oh shit, I wished that had not gotten taken from me."
bit OT but where i lived back in the day you just left the car doors unlocked all the time and never left stuff in it overnight. otherwise peeps would bust a window anyway just to open the doors a search.
so let em open it and look. see? nothing here for you. maybe they will even be extra polite a close it after.