I have an old friend who has a gun safe in a place that has extreme temperature swings and needs a really good dehumidifier. He has one now but it cant keep up and he is getting some residue on his guns. I have not been out to inspect the situation yet so I really don't know what he has going on but I'm guessing I could help him out by getting him a really good dehumidifier to handle the load. Anyone have any suggestions?