Joel, my recharging setup is a 10x6x4 Tupperware container. Have a small platform (smaller plastic container ~3x4x2) that the boveda packs sit on. I fill the main container with about 1 inch of warm water. Only takes a few weeks to plump them back up.
As others have mentioned, you need to get the surface area up to make a difference. More surface area = more evaporation and more absorption by the boveda.