FROG SPIT Anti-Fog Concentrate Review: A 2 oz. Solution for Glasses, Goggles, and Face Shields
Foggy lenses are a persistent annoyance for anyone who wears glasses, goggles, or face shields, especially when moving between temperatures or wearing a mask. FROG SPIT Anti-Fog Concentrate aims to address this with a small 2 oz. bottle that promises to keep optics clear. After testing it on a few different surfaces, the results are mixed but generally functional for specific use cases.
The product is a concentrated liquid that you apply to lenses, then rinse off or buff. The instructions suggest a few drops on each lens, spreading it evenly, and either letting it dry or wiping it clean. In practice, the application process is straightforward, but it’s easy to over-apply, which can leave a slight residue. For glasses and safety goggles, it works reasonably well in moderate humidity, reducing fog for about 30 to 60 minutes before needing reapplication. On face shields, the effect lasts a bit longer, likely because they don’t trap heat as close to the skin.
Key functional features include its concentrated formula—meaning a little goes a long way—and its compatibility with most optics, including polycarbonate and glass. The 2 oz. bottle is compact enough to toss in a pocket or bag, which is handy for on-the-go use. However, the concentration can be a double-edged sword: if you don’t dilute it properly or use too much, it can streak or attract dust.
One notable limitation is that FROG SPIT doesn’t perform well in extreme conditions. In high-humidity environments, like a steam-filled kitchen or a rainy outdoor setting, the anti-fog effect fades noticeably faster. It’s also not ideal for delicate coatings on expensive camera lenses or binoculars, as the product’s surfactants might interact poorly with specialized coatings. For standard eyeglasses and ski goggles, it’s a decent temporary fix, but don’t expect it to last through a full workout or a long hike without reapplication.
Comparing it to alternatives, FROG SPIT sits between disposable anti-fog wipes and spray-on solutions like Cat Crap or Optix 55. Wipes are more convenient for single use but generate waste and cost more over time. Sprays often require a microfiber cloth and can be messier. FROG SPIT’s concentrate is more economical per application if you’re willing to fuss with the application process, but it’s less consistent than a dedicated anti-fog spray that’s pre-mixed. For someone who needs a quick, no-hassle solution, a spray might be a better choice. For those who don’t mind a bit of trial and error, the concentrate offers value.
Who is this product suitable for? It works for people who regularly deal with fog on glasses or goggles in mild conditions—think daily commuters, cyclists, or lab workers wearing safety glasses. It’s also fine for occasional use on face shields if you’re in a dry climate. However, it is not suitable for anyone needing long-lasting fog resistance in high humidity or for extended periods, like swimmers or skiers in wet snow. It’s also a poor fit for users who want a set-it-and-forget-it solution, since reapplication is often required.
Overall, FROG SPIT Anti-Fog Concentrate is a functional but imperfect product. It does the job for short-term clarity, but its limitations in extreme conditions and the need for careful application mean it’s not a universal answer. If you’re willing to experiment with the right amount and accept that it’s a temporary fix, it’s a reasonable option. If you want something more reliable or hassle-free, you might look at pre-mixed sprays or even anti-fog wipes. As with many niche products, it’s worth trying a small bottle first to see if it fits your routine.