I realize how important polarized glasses are to fly fishing. It is time for a new pair and I am looking primarily at Smith and Costa. Up to this point I have worn mostly plastic lenses, but I am giving thought to glass lenses this time around. I am aware of most of the pros and cons, but there is one question I am not sure of. One of my biggest complaints with my glasses seems to be that they fog up pretty easily. Someone told me the other day that glass lenses fog-up more quickly than plastic lenses. Has anyone else found this to be true? I've got a couple of models picked out, I'm just trying to decide which lense to go with. Thanks for any response.