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The silicone of the facial mask undergoes a slow exudation process once it is extracted from the mold where it has been injected. This process gradually greases the elements in contact with it, creating the annoying and famous greasy film on the glass that causes so many headaches for divers. Eliminating it is necessary to avoid having to, dive after dive, be forced to use the traditional anti-fogging devices.
A good deep degreasing is the best basis to avoid having to worry about our mask for life. The systems that have traditionally been used for this function are always aggressive, in many cases surprising and in some even dangerous: immersion of the glasses in cola drinks, abrasion with toothpaste, burning the glass, use of industrial degreasers of poor compatibility with the plastics, etc.
Cressi has specifically developed PRENOFOG, a product with a unique presentation in 8 g single doses that has been extensively tested before being marketed among masks considered "invincible" by their owners. It is a gel with great degreasing capacity and a slightly erosive texture (contains pumice stone microgranules).
A single application rubbing the inside of the crystals for a maximum of two minutes and its immediate and perfect rinsing with water guarantees surprising effectiveness, well above the usual systems and without any risk.