The musty smell inside the car is unpleasant no matter the time of year. But it seems as though the problem worsens during the summer. Especially when your car remains parked under a blazing sun for several hours, with a half-empty yogurt smoothie in the cup holder (true story). Hence, we give ourselves a big pat on the back for installing a Febreze CAR Vent Clip in one of the air vents on the dashboard of our car. The device promises to refresh the interior of our car in a flash.  We particularly appreciate that we can easily adjust the fragrance intensity, which we prefer to be subtle, except in times of fragrant crisis! 

Between $3.99 and $5.99 at department stores.