For years I have been using with great success a combination of "lens burning" and "toothpaste scrubbing" to prepare my new masks before first use (otherwise they fog up instantly and hopelessly). I just picked up a new mask for my kid from Mares (dual lens, tempered glass, nothing special) and to my surprise noticed the following sentences in the user manual:
"Never allow open flames or blasts of hot air to come into direct contact with the lens. This could damage the temper causing the lens to break and [sic] serious risk to the wearer's eyes."
"Never use toothpaste, surficants, solvents, soaps (even if neutral), detergents, alcohol or hydrocarbons to clean the mask, as they could cause deterioration of the parts. Keep away from oils, greases, suntan creams and lotions."
I am very confused now. If I read this right, Mares is saying that I should not burn the lens, scrub with toothpaste, or even apply mask defoggers (surficants, soaps, detergents). Even more, my kid should not use sunscreen while using the mask. This is exactly the opposite of everything I have been practicing for 25 years. So, have I been doing it all wrong all these years causing irreparable damage to my masks? Or is the Mares user manual written by some defensive lawyers who have no clue about masks and have stopped short of writing something crazy like "never use this mask in the water"? How is one to break in a new mask while observing these manufacturer's restrictions?