Well, according to pathology professor Dr. Romney Humphries from UCLA, those food spills grow thousands more bacteria than anything else that gets in your car. And although they’re unlikely to make you seriously ill from a stomach bug – the bacteria could create an explosion of allergy-triggering mold! So, vacuum your car at least once a month. And clean up spills and sticky fingerprints with anti-bacterial wipes. The top 3 places where germs live are the steering wheel, the door handles and the gearshift… All high-touch areas.