How long does one can last?

Gel fresheners typically deliver scent for several weeks depending on cabin heat and ventilation. Warmer climates and highway driving speed up evaporation slightly.

Can I use this on my dashboard in direct sunlight?

Yes—the gel holds its shape and won't leak or drip under heat. Place it in a cup holder or secure it on a vent clip if your dash gets very hot.

Will this stain or leave residue on fabric?

Gel formula is non-staining when used on hard surfaces. Keep it away from upholstery and use a cup holder or clip to avoid any contact with seat material or carpet.