How to Correct Humidity for a Humidor

Check the humidor's hygrometer. The hygrometer is the gauge that tells the humidity. If the humidity is below 65 percent, open the humidifier. The humidifier is a small device in the humidor that holds the liquid needed to moisturize, or humidify, the interior of the humidor. The humidifier contains foam set between slatted plastic covers. The moisture escapes through the slats and into the humidor.

To correct the humidity of the humidor, prepare a mixture of distilled water and propylene glycol in a bowl that is large enough to hold the humidifier. Humidifiers come in a variety of shapes and sizes. Add one part distilled water to one part propylene glycol. It is also a good idea to add a small amount of germicide to the mixture, as this will prevent the growth of any bacteria.

Remove the humidifier from the humidifier. Place it in the bowl. Allow the foam inside the humidifier to thoroughly absorb the solution of distilled water and propylene glycol (and optional germicide). Turn the humidifier over and let it soak thoroughly on the other side. When the foam is saturated, remove the humidifier, and shake off any excess solution.

Place the humidifier back into the humidor. Close up the humidor, and allow the humidifier to begin to moisture the interior of the humidor. Periodically check the humidor's hygrometer. The distilled water and propylene glycol solution acts both to raise humidity, and also to absorb excess humidity. If, over time, humidity levels begin to drop, moisten the humidifier with a small amount of distilled water.

If the humidor's hygrometer reads over 75%, then there is too much moisture. Remove the humidifier, and leave the humidor open for a short time. Close the humidor for short time to allow the hygrometer to register the humidity inside the humidor. Check the hygrometer to see if humidity has returned to the proper level. If humidity is still too great, leave the humidor open again for another period of time.