I have had mine almost a year, and it has the new car smell..

Tips:
Never eat food in the car..EVER!
Keep it in the garage
Never drive it in the rain
Vacume once a week needed or not
Never use any products inside the car
TAKE a ShOWER :-)

 

You forgot:
Never roll down your windows
Set climate control to recirculate

 

The dealers use a spray. In fact most of them sell it too.

Personally I prefer the leather smell so I use Zaino on my seats, dash, door panels and other vinyl parts. Smells great!

 

I'm gonna find a way to bottle it, and sell it as a womans perfume... I'll call it "driveBy" What guy is not gonna be attracted to a girl that smells like a new ride.....

I'll be RICH.....