Cigar enthusiasts understand the need for maintaining the proper and stable relative humidity in a cigar humidor. Humidors are commonly made of wood and lined with Spanish cedar. The cedar acts not only as a natural defence against tobacco beetles but also helps to regulate the humidity of amount of moisture in the humidor. Humidification devices provide moisture to the humidor, and they often rely upon a cigar solution that is designed to absorb excess moisture into the device or force moisture out into the humidor.
Place a large measuring cup on a convenient work surface. Choose a cup that is capable of measuring at least 4 to 5 cups at a time.
Determine the size of the storage container or the amount of humidor solution you will be making. Pour enough propylene glycol, or PG, into the measuring cup to fill the storage container half full. Pour the PG into the storage container.
Pour the same amount of distilled water as PG into the measuring cup keeping in mind that a 1:1 ratio of PG to water is necessary. Pour the distilled water into the storage container.
Place a lid on the storage container and shake. Continue shaking for a minute or so to thoroughly mix the PG and distilled water together.