I honestly don't understand why you're having such a hard time keeping the humidity in a 10 gallon glass tank. When I had a 10g, all I did was cover 2/3rds the top with a dry towel all the time and it worked fine. Now, I have a 20gal critter cage and I covered 2/3rds the top with tin foil on the back of a piece of cardboard and the humidity is stable with daily misting. I use aspen bedding and have no need for moss or anything.