Are you looking for one of the easiest ways to humidify your cigars? Look no farther, as science and cigars have finally met in beautiful union. The rest of their kids are pretty nasty looking, but this one is the keeper. This my friend is specially engineered silica gel. All you really need to know is this. This stuff is used in museums to control the humidity in artwork. If Mona Lisa trusts her humidity to this stuff, then you should too (yes there is an easy joke there, but come on now, focus).
Each 1lb bag will humidify up to 5 cubic feet of space. All you need to do is place the beads in a shallow container, spray with some distilled water until 70% of the beads are wet, then place inside your humidor (in the shallow container). Let science do the rest. When the beads turn color, spray them down again. You can use them indefinitely, they never need to be replaced, and they will last several weeks before needing a spritz.
