I like the idea of jars and keeping several different types of tobacco on hand. For a large jar that does not have a humidification device in the lid (stone, metal disk, etc), how do you keep the humidity up? I ordered a small glass tobacco jar that had a humidity gauge mounted in the wooden lid, had a silicon liner to keep out the air and also a loose stone in the shape of a leaf. I assume I would wet the stone, but I don't think it would be a good idea to place it somewhere in the jar with the loose tobacco. Or am I wrong. Appreciate any tips/tricks on how you keep humidity up in storage jars, etc, that have no humidification device. Thanks in advance