I've got 4 snakes, and 2 snapping turtles in my reptile room, the humidity for the snakes is great, thanks to the turtles, but the humidity in the room is also good for mildew. I've noticed in the past few weeks, an increasing amount of mildew around the window and on the wall in some areas... Is there any way to prevent it? Its more of the smell than the look... My roomie has some bad allergies, and we think this could be a cause...