How long does one gel freshener last?

Lifespan depends on cabin size, ventilation, and ambient temperature. Gel formulas typically outlast liquid air fresheners by weeks, but exact duration isn't specified in the product data — monitor scent intensity and replace when it fades.

Can I use this in a cup holder or does it need to mount somewhere else?

The compact size works in standard cup holders. No mounting hardware or adhesive is included — placement is up to you. Just make sure it won't shift during driving.

Will this stain or damage dashboard plastic if it leaks?

Gel formulas are thicker and less prone to spillage than liquids, but the exact composition isn't confirmed. Keep it upright and away from critical electronics or trim finishes to be safe.