In the empty humidor, put down a paper towel. Put a cup of distilled water in there. Leave it in for a day or two along with a digital hygrometer which has already been given the salt test. When the hygrometer gets to at least 62%, take out the cup of water, and already have the humidifier "charged" and ready to go. Insert your humidifier and cigars, and check twice a week to verify humidity levels. For further information, do a search on these forums.