I'm pretty sure the two above steps aren't actually good ideas, as they harbor heaps of bacteria. Not 100% sure, but pretty sure
What I do is mist about twice daily with hot water - must be hot, because as you mist it, it cools down. Also, heat lamps zap moisture from the air so that's a big thing to have to get past, especially if the ambient air temp in your room is so low (omg i'd die in that, I keep my ambient room temp at 80 <3 my blanket is more just for cuddling than covering)
Cover the screen on your tank with foil, get some sphagnum moss, and mist if needed. That should pretty much do the trick.
OH, and there's also a substrate called Cypress Mulch that you could try too.