It sounds like one of those odd roadside tips you hear once and never forget: when you travel alone, place a bag over your car mirror. At first, it seems almost too simple to matter. A plastic grocery bag? On a mirror? Really?
But this small habit has a few practical uses, especially when your car is parked somewhere unfamiliar. Think hotel lots, campsites, roadside stops, airport parking, snowy driveways, or a quiet street where you do not know the neighborhood. The bag is not magic. It will not turn your car into a vault, and it should never replace basic safety habits. Still, used correctly, it can protect your mirror, reduce a few annoying risks, and remind you to stay alert before getting back behind the wheel.
The important part is this: the bag belongs on the mirror while the car is parked, not while you are driving. Before you move, remove it, check your mirrors, and make sure you can see clearly. On the next pages, you will see why this strange trick became popular among cautious drivers. It is simple, cheap, and easy to remember anywhere, too.