This $9 device can clean up car odors

Quick, stick your head in your car. What do you smell? If your answer includes sweat, smoke, feet, your dog’s farts, or that cheeseburger and fries you had back in 2013, it’s time to do something about it. And that means a solution that’s a little — or a lot — more sophisticated than that pine tree air freshener that’s been there for years.