As a glasses wearer, I’ve always struggled with my glasses misting or fogging up on cold days. Whereas as my visor stays clear through the use of a Pinlock, there is no obvious solution for glasses, just a multitude of products to squirt on that claim to stop all misting up. But do they really work? In the name of science I conducted a mini experiment to compare some popular products to ascertain which were most effective.
I used a number of old pairs of glasses, which I first cleaned then applied the various products as per their directions. As a control, one pair were left untreated. I then placed the glasses in the fridge to cool to 5℃, to mimic a ride on a cool winters day. First I took the glasses out into the kitchen with a humidity reading of 55%, to see how the lenses misted up (or not). Secondly I repeated by taking the glasses from fridge to hot shower room with a humidity reading of 60% to test a more extreme scenario.
The products tested here are those I have purchased myself for unbiased testing.
Muc-Off Premium Anti-Fog Treatment
A well known brand, this solution comes in a small 32ml spray bottle. To apply, you just spray it on, then buff up with a soft cloth. Price is around £9-£10.
FogTech is supplied in a 30ml bottle and three small application sponges. To use you just soak a sponge with the solution, wipe on your lenses then leave to dry. Price is around £16.
Another product from the above company, though technically more targeted as a hydrophobic water repellant. A thick gel that is supplied in a number of sachets to be applied with a supplied sponge, left to dry, then buffed up.
Experiment #1 – 55% humidity
The control glasses misted up instantly, however the Muc-Off Antifog and FogTech pairs remained completely clear. The RainCoat misted up, but worse they remained misted for sometime after the control pair naturally cleared up a few minutes later.
Experiment #2 – 60% humidity
The control and RainCoat glasses fogged up significantly. The Muc-Off Antifog and FogTech pairs displayed a minor amount of fogging. However after a few minutes, the control pair naturally cleared, but the Muc-Off Antifog and FogTech pairs remained slightly smeary for some time after.
Neither product here offered a magic bullet perfect solution, but some certainly offered some gains. Clearly the RainCoat is a bad choice for use on glasses, but then it is a water repellant rather than a specific anti-fogging solution. The performance of Muc-Off Antifog and FogTech was remarkable similar and difficult to distinguish. Both generally performed better than the no treatment, with the caveat that they don’t prevent fogging completely and can take longer to clear when they do finally fog up a little. Considering Muc-Off is much cheaper than FogTech, it gets my recommendation.