How long does one can last?

Gel cans release fragrance gradually over several weeks depending on cabin temperature and ventilation. Warmer weather speeds up the scent release.

Can I use this in a truck with heavy AC running?

Yes. Strong AC circulation will cycle the scent faster, so you may need a replacement sooner than in a sealed cabin. Placement under a seat rather than directly on a vent gives you more control over intensity.

Will this gel drip or leak on my upholstery?

Hard gel construction is designed to stay solid and won't leak. Set it on a flat surface under a seat or secure it in a vent clip to keep it stable while driving.