What if I see white crystals in the eye mask?

If you have stored the eye mask in its crystallised (i.e. solid) form for a prolonged period, a small amount of the water in the mask may evaporate. Consequently the solution in the mask will become more concentrated. This more concentrated solution will then have a slightly ‘snowflake-like’ appearance. The mask will still function, but the temperature will be slightly higher. You can try to restore the mask to its original state by boiling it for slightly longer, leaving it in the saucepan and letting it cool down in the water.

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