I have been using these car air vent fresheners for decades now. I like all the different scents they have I’ve tried alot of them. My favorite scent is ‘Linen & Sky’ & ‘Rain’ & ‘Midnight Storm’. My hubby likes the ‘New Car’ & ‘Gain’ and my mother loves the ‘Hawaiian Aloha’ scent, a ‘Violet’ scented and ‘Pumpkin’ scent. They are sold at costco so I pick one of these every 6months or so. They are easy to use, I pop the little clip into the freshener and it breaks the seal so the freshener can do its job. Then you clip it onto your vent and adjust the lever to release alot or just a lil scent at a time.
They are cheap, you can buy them almost anywhere. I like Febreeze products and trust the brand.