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The short answer: To prevent fogging and leaks, rinse your snorkel set with fresh water after every use, use a dedicated defogging solution (or baby shampoo) before each snorkel, dry it thoroughly out of direct sunlight, and store it properly to protect the silicone seals. Regular maintenance also includes inspecting O-rings and replacing worn parts.
Fogging occurs when moisture condenses on the inside of your mask lens. This is because the water temperature is cooler than the air inside your mask, and the difference creates condensation. To prevent fogging, you need to create a thin film on the lens that prevents water droplets from forming.
Here’s a simple routine: before each snorkeling session, apply a few drops of baby shampoo or a commercial defogger to the inside of the lens, rub it around gently, then rinse briefly with water. Don’t rinse too much or you’ll wash away the film. You can also use a commercial anti-fog spray, but many snorkelers find that baby shampoo works just as well and is cheaper.
Also, make sure your mask is properly fitted. A mask that leaks water will fog up more because the water evaporates and condenses. Check the skirt (the silicone part that seals against your face) for any debris or hair that might break the seal.
After each snorkel, even if you’re on a boat, rinse your entire snorkel set with fresh water. Salt water, sand, and sunscreen can degrade the silicone and cause leaks over time. If you don’t have access to fresh water immediately, at least swish the mask in the sea to remove large particles, but do a thorough rinse as soon as possible.
Once rinsed, let everything air dry out of direct sunlight. Sunlight (UV rays) can break down silicone and plastic, making them brittle and prone to cracking. Hang your mask by the strap or place it on a towel. For the snorkel, shake out excess water and let it drain. Don’t leave them in a hot car or in a stuffy bag.
For storage, use a mesh bag or a dedicated snorkel case. Keep the mask in a hard case if you have one, to prevent scratches and pressure on the lens. Always store away from extreme heat and chemical fumes.
If you notice a film inside your mask or an odor, it’s time for a deeper clean. For the mask, use a mild soap (like dish soap) and warm water. Gently scrub the lens and skirt with a soft cloth or your fingers. Avoid abrasive cleaners or scrub pads, as they can scratch the lens and damage the anti-fog coating.
For the snorkel, you can clean the mouthpiece and barrel with a soft brush (like a baby bottle brush) and soapy water. Rinse thoroughly to remove all soap residue. To kill mildew and remove odors, you can soak the snorkel in a solution of one part white vinegar to three parts water for about 30 minutes. Then rinse very well.
For the mask, you can also use a special cleaning gel made for dive masks, but avoid using toothpaste or other abrasive pastes, as they will scratch the lens.
Leaks usually happen around the mask skirt or the snorkel’s purge valve (if your snorkel has one). The most common cause is a damaged or dried-out silicone seal. To avoid that, never store your mask with the skirt folded or under heavy objects. After cleaning, you can apply a thin layer of silicone grease (available at dive shops) to the skirt to keep it supple, but avoid getting it on the lens.
For the snorkel’s purge valve, check that the silicone flap is not torn or stuck. If it’s sticky, clean it carefully and ensure it moves freely. You can also replace the valve if it’s worn out.
It’s also a good idea to check the O-rings on any mask with corrective lenses or if your snorkel has a dry-top mechanism. O-rings are cheap and easy to replace, and doing so can prevent leaks.
Even with excellent care, snorkel gear will eventually wear out. Silicone degrades over time, especially with frequent use and exposure to sun and chlorine. If you notice that the mask skirt has lost its flexibility, is cracking, or no longer seals properly, it’s time for a new one. Similarly, if the snorkel mouthpiece is torn or the barrel is cracked, replace it.
If you have a full snorkel set, you can often replace individual components. Many brands sell replacement mouthpieces, straps, and purge valves. However, if the mask and snorkel are old and you’re experiencing multiple problems, it might be more cost-effective to buy a new set. Always check the condition of the straps, buckles, and clips. A broken strap can ruin a trip.
If you’re storing your snorkel set for more than a few weeks, follow these steps:
No, toothpaste is abrasive and will scratch the lens, reducing visibility and making it harder to see underwater. Use a mild soap or a dedicated mask cleaner.
Typically, a well-maintained mask can last 3-5 years, but it depends on usage and UV exposure. If the silicone becomes stiff, discolored, or cracked, replace it.
Yes, if you want a clear view. Even with a clean mask, fogging can happen. A small amount of defogger or baby shampoo before each dive is the best way to prevent it.
For more in-depth advice on choosing a snorkel set that will be easy to maintain, check out our best snorkel set guide. We highlight models with high-quality silicone and easy-to-clean designs.
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