I wish someone had spelled out a little more clearly for me years ago: winter is not gentle on stuff you leave in your car. I used to think, you know, it’s just cold—throw on a coat and everything’s fine. But apparently, things inside your car also freeze. Or explode. Or melt into weird goo.
I’ve learned the hard way that there’s a long list of stuff that doesn’t belong in your vehicle when temperatures dip, and—yeah—I’ve ruined more than one lipstick and nearly destroyed a laptop. Here’s the stuff I now double-check before locking the door and walking away.
1. Electronics
Let’s start with the obvious one. I once left my phone in the center console overnight—woke up to a screen that wouldn’t turn on. Just a sad little black rectangle. Cold weather drains battery life fast, and in extreme temps, the internal parts can actually… break? I didn’t know that until I googled it with another phone while whisper-yelling “no no no.”
2. Medications
Medications are sneaky. They look fine, but if they’ve been frozen and thawed, there’s a decent chance they won’t work the way they should. Some even change chemically. I’ve kept ibuprofen in the glovebox before and thought, “eh, it’s sealed.” But if it’s too cold? Effectiveness = questionable.
3. Beverages
Water bottles? Soda cans? They seem harmless. But frozen drinks expand, and when that happens, well… boom. I’ve opened the door to find a Diet Coke had exploded and left what looked like sticky shrapnel all over the dashboard. Lesson learned.
4. Musical Instruments
This one stings because I left my old acoustic guitar in the backseat one winter after a late-night jam session. Totally forgot. The next day it was out of tune and the neck was warped. Guitars, violins, any instrument made of wood—they hate the cold. They shrink, shift, and sometimes crack.
5. Cosmetics
Lipstick becomes rock hard. Mascara gets weirdly flaky. I had a whole makeup bag that lived in my glovebox at one point (don’t ask why), and in January, everything in it either froze solid or separated. Putting that stuff on your face afterward? Not a great idea.
6. Chocolate and Candy
I’ve left a couple chocolate bars in the console thinking they’d be fine. Spoiler: they weren’t. Chocolate gets weird after it freezes—crumbly and chalky. Gummy candy goes rock-hard. And if any of it thaws again inside the car when the sun comes out, it just becomes a sad melted puddle.
7. Houseplants
Why did I put a plant in my car in winter? No idea. Maybe I was taking it to a friend? It doesn’t matter. I forgot it overnight, and the next morning it looked like it had gone through a breakup. Plants just can’t handle freezing temps. They go limp and don’t really bounce back.
8. Crayons
I have a toddler, so at one point, we had crayons rolling around everywhere—backseat, cupholders, floor mats. I didn’t realize cold affects them, but yep. They can get brittle in freezing temps and crack. And if your car warms up again, they’ll melt. And melted crayon is basically permanent.
9. Musical CDs and DVDs
Okay, I know not everyone uses these anymore, but I still have a few hanging around. Left a couple in the car and, sure enough, the plastic cases cracked. Even the discs can warp or become unreadable in extreme cold. If you’ve got anything you care about? Bring it inside.
10. Glue and Adhesives
Ever tried to use frozen glue? Yeah, it doesn’t work. I kept a tiny superglue tube in the trunk (for emergencies—because why not?) and when I needed it, it had solidified. Cold makes adhesives basically useless. Better to keep them inside, somewhere warm-ish.
11. Winter Sports Gear
This surprised me. I figured skis and snowboards are made for cold. But apparently, the materials don’t love being left in freezing temperatures for hours. Cold makes them brittle. Which can mess with their performance and maybe even make them crack under pressure. Literally.
12. Lighters and Aerosol Sprays
Aerosols and extreme cold don’t mix. They might stop spraying altogether, or just hiss weirdly. I’ve left deodorant in the car (again—don’t ask why), and it barely worked afterward. And lighters? They just… don’t light. Not when they’re that cold.
13. Perfumes and Cologne
I left a bottle of perfume in the glovebox once—just figured I’d freshen up before work sometimes. But the cold messed with it. The scent wasn’t right. Kind of dull and… off. Cold can change how fragrances smell, and not in a fun way.
14. Leather Items
Leather gloves, a wallet, a jacket—any of that left sitting in a freezing car overnight? Not great. The leather stiffens, sometimes gets weird creases, and just feels… dry? Mine felt like cardboard. It took weeks of conditioning to fix it.
15. Sensitive Documents
I once kept a folder with paperwork in the backseat. It got brittle from the cold and a couple pages cracked like old receipts. If it’s something important—birth certificate, title, whatever—don’t risk leaving it in the car overnight in January.
16. Pets
This one should go without saying, but… yeah. Never leave pets in a freezing car. Even if you think you’ll only be a minute. Cars get cold. Fast. And your dog or cat doesn’t have the same insulation your coat gives you. Bring them in or leave them home. No exceptions.
17. Glasses
I left my sunglasses on the dashboard last December. When I put them on, the plastic felt brittle and the lenses had these weird pressure spots? Cold can warp glasses, especially if they go from freezing to warm quickly. Better to keep them in a case—or your coat pocket.
So yeah. Turns out winter and cars don’t mix well with a lot of everyday stuff. I keep a small tote now and just toss anything temperature-sensitive into it when I’m going inside. Might look a little over-prepared, but at least I’m not scraping frozen lip balm off the console anymore.
Want to make your winter even easier to navigate? These clever tips will help make winter more bearable.
