How long does one can last?

Typical gel cans run 4–6 weeks depending on cabin temperature and ventilation. Warmer temps speed evaporation, so expect shorter life in summer.

Where should I place it in my car?

Cup holders work best for stability and even scent dispersion. You can also set it in a door pocket or dash cavity—anywhere it won't tip during hard cornering.

Will this interfere with my air vents or electronics?

No. Keep it away from direct airflow into vents (it'll dry faster), and don't place it near power sockets or control panels. A cup holder or side pocket is safest.