How to Prepare Your New Scuba Diving Mask for Crystal-Clear Vision

Getting a new scuba diving mask is exciting. However, if you don’t prepare it properly, you’ll quickly run into fogging issues. Whilst new masks come with a protective silicone film on the inside of the lens, a residue from the manufacturing process that prevents defogging solutions from working effectively.

Luckily, there are several methods to remove this layer and ensure a fog-free dive. Below, we’ll explore the most effective techniques—including one you might not expect: using Coca-Cola!

Why Does a New Scuba Diving Mask Fog Up?

When a scuba diving mask is manufactured, a thin layer of silicone residue remains on the inside of the lens. This layer repels water and prevents anti-fog solutions from working correctly. The result? Persistent fogging, no matter how much defogger you use prior to your dive.

To ensure a clear view underwater, you need to remove this layer before your first dive. Here’s how.

Best Methods to Prepare Your New Mask

1. The Lighter Method (Burning the Film Off)

Effectiveness: ⭐⭐⭐⭐⭐

One of the most popular methods among experienced divers is using a lighter to burn off the silicone layer inside the mask.

How to do it:

• Hold the lighter close to the inside of the lens and move it around until the glass turns black from soot.
• Let it cool, then wipe the soot away with a clean cloth.
• Rinse thoroughly with fresh water.

✅ Pros:

• Very effective—often works in one attempt.
• Permanently removes the protective film.

❌ Cons:

• Can damage the silicone skirt if done incorrectly.
• Not safe for plastic or coated lenses.
• Risk of overheating and cracking the lens.

Best for: Divers with glass-lens masks who are comfortable handling fire carefully.

2. The Toothpaste Method (Abrasive Cleaning)

Effectiveness: ⭐⭐⭐⭐

Toothpaste works as a mild abrasive, gently scrubbing off the silicone layer.

How to do it:

• Use a non-gel, non-whitening toothpaste.
• Apply a small amount to the inside of the lens and rub in circular motions with your fingers or a soft cloth.
• Rinse and repeat if necessary.

✅ Pros:

• Safe for all mask types.
• No risk of heat damage.

❌ Cons:

• May require multiple treatments.
• Can be time-consuming.

Best for: Divers who want a safe and reliable method without fire or chemicals.

3. The Coca-Cola Method (Soaking Overnight)

Effectiveness: ⭐⭐⭐

Yes, you read that right—Coca-Cola! The acidity in the soda can help dissolve the protective silicone layer.

How to do it:

• Pour Coca-Cola inside the mask, making sure the lenses are fully covered.
• Leave it to soak overnight.
• The next morning, rinse it thoroughly with fresh water and mild soap.

✅ Pros:

• Safe for all mask types, including coated lenses.
• Requires no scrubbing or effort.

❌ Cons:

• Can be sticky if not rinsed properly.
• May require more than one soak for full effectiveness.

Best for: Divers looking for a low-effort, risk-free solution.

4. The Scrubbing Method (Using Abrasive Cleaners)

Effectiveness: ⭐⭐⭐⭐

A more aggressive approach involves using a mild abrasive cleaner, such as a non-scratch dish scrub or a dedicated mask-prep solution.

How to do it:

• Apply the cleaner to the inside of the lens.
• Use a soft cloth or sponge to scrub in small circles.
• Rinse thoroughly.

✅ Pros:

• Effective for most masks.
• Less messy than toothpaste.

❌ Cons:

• Some cleaners contain chemicals that can damage the silicone skirt.

Best for: Divers looking for an easy, store-bought solution.

5. The Dish Soap Method (Gentle Cleaning)

Effectiveness: ⭐⭐

This method is the least effective but works well as a follow-up after other treatments.

How to do it:

• Wash the mask thoroughly with warm water and dish soap.
• Scrub the inside of the lens gently with a soft brush or cloth.
• Rinse well.

✅ Pros:

• Gentle on all mask materials.
• Quick and accessible.

❌ Cons:

• Does not fully remove the protective layer on some masks.

Best for: Quick cleaning or a follow-up after another method.

Final Recommendations

🔹 Check your mask type. If your mask has special coatings (e.g., UV protection, mirrored lenses), avoid the lighter method.
🔹 Always rinse thoroughly. No matter which method you use, wash your mask well with fresh water afterward.
🔹 Use anti-fog treatments. Once the protective layer is removed, apply saliva before each dive. or use ecological anti-fog spray or baby shampoo.
🔹 Store your mask properly. Keep it in a dry, cool place, away from direct sunlight, to extend its lifespan.

Conclusion

Preparing your new scuba diving mask properly makes a huge difference in your diving experience. The lighter method is the most effective but comes with risks. The Coca-Cola soak offers a surprisingly easy, low-effort solution, while toothpaste and scrubbing methods are safer alternatives.

At Scuba Legends we prefer to use a lighter or toothpaste. Find what works best for your mask, and enjoy crystal-clear vision on every dive!

Want to find out more about about dive equipment? Check our latest article on Wings and BCDs.