Febreze AUTO Gain Original Scent This one’s for you, Gainiacs. Fight odors and treat your senses to the citrus-y freshness of a Febreze Auto Vent Clip in Gain® Original Scent. The just-right floral notes will have your passengers wondering how you fit a flower garden in your car.  HOW TO USE To activate scent, firmly push clip until you hear it click in. Clip onto your car vent, and drive on with freshness. TIP: You’re in the driver’s seat. Control the scent intensity with the dial found on the top of each AUTO Vent Clip, for a range from light freshness to scent-tastic. WHERE TO USE USE: AUTO Vent Clips work in virtually every vehicle—mom mobiles, commuter carpools, dog cars—with scents that beg for the windows to stay up.