Febreze Odorclear bilventilsluftfräschare, Hawaiian Aloha - 8-pack X 0,06 fl.oz / 200 ml - 30 dagar

The scent is really pleasant—strong enough to notice but not overpowering. I was skeptical about the 30-day claim, but it's lasting well into the second month with just one clip.

I've had these clipped to my vents for a couple weeks now, and the Hawaiian Aloha scent still fills the cabin even on short drives. The clip is really sturdy and hasn't budged once.

I clipped one of these onto my passenger vent and the Hawaiian Aloha smell was noticeable within a few minutes even with the fan off. The little clip holds tight without sliding, and the fragrance is still going strong after two weeks of daily driving.