Best Diving Mask Defoggers of 2025

"This product works really well for me. It lasts for one swim, and I find that I might get more than one swim if I keep the inside of my goggles dry. A small amount is all I need to apply, so reapplying isn't a hassle. My goggles stay very clear!"

"After switching from my usual method, I was pleasantly surprised by this product. I put a drop on each lens, spread it around, added a little water, and let it sit. The result was excellent visibility during my dives!"

"I've tried several brands, but this is the first one that truly worked for me. It was super easy to apply, and I found that it lasted great. I would definitely recommend it to others!"

"This is my favorite mask defogger. I've been using it for years."

"I took this on my trip to Fiji with my new mask and followed the instructions. Sadly, it scratched my mask, making it difficult to see. I was quite surprised and disappointed by the outcome."

"Before my Kauai trip, I bought this defogger, and it worked exactly as described during my seven snorkeling excursions!"

“I absolutely love this company and their products. I just wish they hadn't used USPS for shipping, as they damaged the box a bit, but thankfully only one bottle was slightly crushed.”

“This product was exactly what I needed! My swim goggles were fogging up constantly, making it annoying to see. After a bit of research, I found out about this defogger, and it works perfectly. Just a tiny amount in each lens, a gentle rinse, and I’m good to go!”

“I’ve been using this defogger during my synchronized swim team practices. It lasts the entire 2.5-hour session, even with goggles on and off multiple times. I’m really impressed!”

"I just tried this defogger and I'm thrilled! It works great for defogging my mask. What really impressed me was the lasting effect. A single application lasted longer than my swims, unlike other products that required frequent reapplication. I followed my own method, rinsing the mask well, applying one puff, and letting it dry. It worked wonders for me!"

"I recently bought this for a short vacation. I used it for snorkeling and it seemed to work well. I was a bit puzzled about the rinsing part; I followed the instructions but felt it looked a bit smeary. This might have affected my vision slightly. Perhaps I applied too much?"

"I use this product daily for multiple masks as a snorkeling tour guide. It doesn't take much and works excellently. It's the go-to choice for both customers and staff masks!"

"After using Spit on my bathroom mirror, I noticed it remained clear even after a hot shower. The water was there but not in droplet form. It also worked well on my motorcycle helmet face shield, allowing me to see clearly while riding in cold weather—much better than the usual fog!"

"As a regular swimmer, I found this version of the product much easier to apply to my swim mask compared to the spray containers. I’ll definitely be purchasing it again!"

"I tried using this product on my prescription glasses, but unfortunately, it left a haze instead of preventing fog. The thick consistency made it hard to clean off, and the directions were misleading. I was cautious about putting an eye irritant so close to my eyes."

"I took this with me on a trip to Roatan, and it worked great for all the snorkeling we did!"

"I've used this product multiple times, and it performs very well. It's a great value!"

"I absolutely love this stuff! It's the best antifog I've ever used. I started using it from day one, and now others are always asking to borrow my 500PSI during our trips. I’m known for carrying the good stuff. Plus, the carabiners make it super convenient for dives, and there have been no leaks so far."

"I applied this to the inside of my motorcycle helmet, and it works PERFECTLY for about 20 minutes in high humidity. Eventually, I noticed some moisture build-up, but if I let it air dry, it helps a lot!"

"After using this on my goggles while riding my bike, I noticed they no longer fog up, and the liquid also cleans the lenses well. I received one bottle and two cloths for wiping."

"I found that once I figured out how long to let the spray sit and how thoroughly to wipe my glasses, it worked fabulously to prevent fogging from my face mask. However, I'm struggling to clean my glasses with my usual cleaner now, as it feels like there's a film left behind."

"I've tried so many anti-fog brands, and this one is the best! I can swim without stopping to clean my goggles now."

"While the product works, it definitely requires a good rub-in to be effective. I keep one in my truck, purse, and at home."

"I found that this anti-fog spray is great for wearing glasses with a mask. The applicator is compact and simple to use."

"When I teach scuba classes, this is the only product I trust to help my students with their masks."

"I believe this is the best defog on the market, just be careful not to overapply."

"Unfortunately, my bottle arrived used and unsealed, which was disappointing."

"I've always struggled with mask fogging due to my body heat. I reluctantly tried this product, and it worked perfectly! After following the directions and pre-treating my mask, I had no fog during snorkeling and SCUBA diving with my Tusa Liberator mask."

"My wife and I got PADI certified recently, and we were glad to have this defogger. It took some practice to apply it right, but it made a huge difference. We ensure to apply it about an hour before diving, which keeps our goggles in great condition for hours underwater."

"I've tested countless defog products over the years, and nothing compares to 500PSI. It's thick and effective, keeping my mask fog-free for the entire dive. I often share it with others on the boat, and they envy my clear vision!"