To the other peeps out there that have hard water - how the heck do you safely get rid of the hard water spots inside the tank (from misting it down to keep the humidity up)? Is there a special cleaner that you use? I know I can't use freaking lime-away in there, but just a wet rag doesn't do crap either. It's just a cosmetic thing but it really bugs me that the tanks look so grimey when they're "clean" - I want to be able to clearly see my pretty sneks! What do??