I highly recommend this product! I drove around all day today with temps at 0*F, using range mode on the heat, with re-circulation only. NO FOG AT ALL! This stuff works great and easy to apply. Very nice guy runs the site as well. My bottle leaked in shipping, and only tiny sloshing left, enough to do this video is all. He sent me a replacement bottle. Here's the site: Fog Fight 100ml Kit - www.CarPro-US.com Very nice product, and I will see what else they have I may like Cheers!