People very comfortably tend to leave their belongings in their cars. However, they are often oblivious to the simple knowledge of things you should never leave inside your car or how to prevent car interior damage from leaving harmful stuff behind. Sometimes, the things people leave behind in their vehicles can either be detrimental to the car or for them. Some items can result in a car that’s stinking and untidy, which (besides the apparent annoyance) could affect its resale value.

With that said, today, we list down seven things you should never leave inside your car. After all, your car should be used for taking you to and fro, not storing your things. Keeping the items mentioned below in your car could put your health and security at risk along with your car.

Wooden musical instruments

Cold temperatures in most cars can damage musical instruments. If the instrument is wooden, such as a violin or a guitar, cold air can cause cracking, which is expensive to repair. Extreme cold or hot temperatures can also cause the glue that holds these wooden instruments together to falter or break down completely.

Aerosol Cans

If you take a look at the side of that can of hairspray, deodorant, spray paint, etc., in your car, you’ll probably see a storage temperature recommendation. This is because pressurized cans are unusually sensitive; outside of that temperature zone, the contents may expand, causing the can to crack or explode.

Water bottles

Multiple studies have linked BPA and phthalates, chemicals found in plastic water bottles, with health conditions such as cancer and heart disease. Letting a water bottle sit in the sun and heat up could cause these chemicals to leak into the water. Moreover, if the bottle has been lying around for some time now, it could start harboring microorganisms as well.


If you manage to leave electronics in your car in plain sight, someone can break your window and steal them (it may sound harsh, but it’s true). But apart from being thief-candy, electronics and random temperature changes also do not get along well. A car isn’t the same as a building – it doesn’t regulate heat in the same way. Once a vehicle stops running, the temperature inside can fluctuate drastically and cause irreversible damage to phones, laptops, tablets, cameras, etc.


Lighters may look tiny, but they surely know how to pack a punch when overheated. The combustible fuel inside the small plastic machines can expand and escape the lighter casing when exposed to a high temperature, which can ultimately result in a fire hazard. Whether the car’s heat will because combustion is a subject of debate, but why take chances? Therefore, it’s important not to keep flammable liquids in your car, especially during the summer.


It would help if you didn’t keep medicines anywhere in your car, especially your vehicle’s glove compartment, where factors like heat, cold, and moisture can damage the drugs’ effectiveness. Certain medications are required to be stored at room temperature and parked cars rarely remain at that point during summer and winter. It’s smart to check the guidelines that come with medications to ensure they’re stored at the correct temperatures.


Tossing a tube of lotion or sunscreen in your bag is always a smart idea, but be careful of leaving the bottle in your car. You might not know it, but exposing sunscreen to high temperatures can shorten its shelf life. Besides losing efficacy, your protective SPFs may end up a big smelly mess if the heat blows the cap open, so you should leave the bottle behind at home, or carry it along with you for your own and your car safety.

Now that you have a clear idea of what all things you should never leave inside your car, we hope that you will maintain your car’s safety and security inside out. However, in case you find that your car is contaminated with a foul odor or any other unwanted issues, try out the peerless car interior detailing service offered at Pitstop and get the vibe of a brand new car all over again! Our experienced technicians are trained to handle all kinds of interior cleaning and sanitization with detailed precision to maintain your car’s safety throughout.