How long does one freshener last?

Gel fresheners typically stay effective for several weeks depending on your vehicle's ventilation and temperature. Warmer cabins will cycle the scent faster than cooler ones.

Can I use this on my dashboard or will it leave a residue?

Gel formulas don't leak or stain like liquid fresheners, but keep it in a cup holder or secured spot where it won't roll around or get knocked over during driving.

Will the strawberry scent clash with my car's existing smell?

Cool Fresh is a clean, light berry scent designed to complement rather than overpower. If your car has strong odors, run your AC on fresh air for 10 minutes before using the freshener to help neutralize them first.