that might explain the dilemma, if so.
i bought one knowing how important they must be (at the same time asking my self why it wasn't water proof). then when the unit arrived, it already had on on it.
sounds like maybe getting a thin layer of silicone on the top of the unit might be a good thing. opening it might void the warranty, but then again the silicone might too.
i take my cover off when wearing sun glass's but pay even closer attention to not getting water on it. fish like throwing water at it tho when releasing them.