How long does the scent last once I open the can?

Longevity depends on cabin size, ventilation, and where you place it. A sealed 1.5oz can will fade gradually over weeks of use — crack the lid partially to control release speed and extend the life.

Can I hang this from a rearview mirror or does it need to sit somewhere?

The can itself doesn't include a hang loop or strap — you'll need to place it in a cup holder, door pocket, or shelf. If you want to hang it, you can add your own string or use an aftermarket air freshener hanger.

Will this scent overpower a small car interior?

Start with the lid slightly cracked and let the squash aroma settle for a few minutes before fully sealing or opening it more. Organic formulas tend to be less aggressive than synthetic fragrances, so it should blend rather than dominate.