How long does one can last?

Duration depends on cabin size and ventilation. Most drivers get weeks of consistent scent from a 1.5 oz can before needing a replacement.

Can I hang this or does it need to sit somewhere?

The can is designed to hang from your rearview mirror or sit in a cup holder—your choice. Both methods work equally well.

Will this scent clash with other cabin fresheners?

Black Squash is a standalone scent. If you're already running another air freshener, remove it first to avoid competing fragrances in the cabin.