Anti-fog coatings are rarely well received in detailing circles, as many have hitherto proven to be difficult to work with and not very effective. In particular, many users have suffered from incurable smearing, recurrent hazing and distracting filminess with the current crop of products on the market. Gyeon set out to specifically address these issues when formulating their coating, and Q² AntiFog is the result. We were extremely sceptical before we started testing it, not only because of the usual issues associated with anti-fog coatings, but also because fogging doesn't seem to be much of an issue for most drivers these days, thanks to more advanced climate control systems. However, after buying a daily driver with manual air conditioning, we quickly realised that it is for some! In terms of application, Gyeon Q² AntiFog is simple to apply and it’s not difficult to achieve perfect smear-free results. If you buff it off too soon you might see some fresh hazing appear, but this is easily fixed by allowing it to dry for longer and then buffing again. The anti-fog performance is readily apparent and certainly improves visibility, even at times when saturation occurs. Aim to reapply it every two months for best results.