Review on BMW Natural Air Freshener Refills (Energizing Tonic) by Scott Schram

I started using them 3 years ago when I got a free starter kit from the service dept. There were 3 sticks in a box and each stick lasts about 2 months+. I close the bracket all the way down leaving only a small hole and replace it every 3 months and it keeps the car's smile fresh. One point is very interesting, after a few months of use my family actually stopped smiling about anything. However, every new passenger journey with us still smiles with fragrance even with a 3 month old filter. I think it's because we get used to smiling. Also, green tea doesn't look like green tea at all, but I still like it.