Defog It Anti-Fog Kit: 5mL Concentrate Squeeze Bottle and Microfiber Cloth for Crystal Clear Vision

Miguel H.: I want to start this review stating that in my life I have made several purchases that did not meet my expectation but by far this product surpassed all of them.
I applied the product following the instructions word by word and the result was terrible.
I bought this to use on my sunglasses while cycling. After I applied the product I could not see any difference in the way my glasses were fogging up.
Save the money and stay away from this product.

United States on Sep 01, 2022

Macy's mom: This stuff works great when I'm indoors. It has been amazing and helped me a ton! I have found that it does not work well when it is cold, like when I was outdoors in the winter. I bought it in December and it is only March now, so I'll see how it works outdoors in the summer. I suspect it will be fine. It has definitely been a huge help with all the mask wearing I have had to do.

United States on Mar 04, 2021

NavyVet1093: I have been using this product for a long time and now I am ready to give an honest review. This stuff work on my eyeglasses. They have not fogged up even after a couple of days. My eyeglasses are made of glass. This product does not work on my sunglasses cause they are not made of glass and fog up, which most products will not work on non-glass. A lot of the products that I have tried did not work on my eyeglasses.

United States on Nov 12, 2020

E. Poinescu: The liquid leaves a highly hydrophilic layer on the surface of the glasses/goggles. I used it for my glasses under a motorcycle helmet in freezing weather. It works well but isn't magical. Similarly to my new helmet's visor with stock antifog coating, the moisture spreads out fairly evenly over the transparent surface rather than clumping into tiny droplets (aka traditional fogging). This layer isn't perfectly even however, and coupled with the index of refraction of water creates a hazy less-than-optically-perfect effect. With a brief exposure to fresh air this layer quickly dissipates and the lens becomes perfect again.

As someone mentioned in another review, this is a chemical approach to a basic physics problem (slash fact of life). Temperature differentials, moisture and condensation, etc.

As for the product itself, it wipes off and needs reapplication (~2 droplets per side per eyeglass lens) every ~3 days. The bottle is miniscule. 5 mL is almost exactly 1 tsp. That is very little for the price and considering constant reapplication is needed. I didn't appreciate the diminished optical quality when "fogged" so I returned it. For driving...

United States on Feb 21, 2016

Sue Johnson: I have used FogTech on my glasses while I played ice hockey for several years now. The glasses did have an anti-reflective coating, but the FogTech worked well. However, I recently got new glasses and the anti-reflective coating used on them was Crizal. The FogTech smeared when put on the glasses. So I tried Clarity Defog It. It works fine, but is very expensive. My recommendation. Try FogTech 1st. It works on many anti-reflective coatings. If it doesn't work, if it smears when you apply it, return it (they WILL take it back) and use Clarity.

United States on Jan 26, 2011