Charging your humidifier is the process of filling your humidifier with water or propylene glycol in order to maintain ideal humidity levels. Here’s how:
  1. Remove your humidifier from your humidor.
  2. While placing the humidifier on a plate, fill the humidifier with distilled water or a solution of 50% distilled water and 50% propylene glycol.
  3. Don’t overfill the humidifier. You want it to be damp, not soaked, so leave it for about five minutes.
  4. Dry the humidifier completely by wiping it down with a cloth.
  5. Place the humidifier back into the humidor - you’ve charged your humidifier!

When to Re-charge Your Humidifier

When your hygrometer reading is less than 68%, it’s time to recharge your humidifier. Simply repeat the steps above.

What is Propylene Glycol?

Understanding the solutions used in your humidifier helps you maintain the delicate balance of humidity and temperature in your humidor. Propylene Glycol is a synthetic liquid that absorbs water. This handy, innocuous substance helps protect your cigar collection in more ways than one.

In humidors, it’s used according to a 50/50 ratio with distilled water to maintain correct humidity levels. This ratio ensures the distilled water evaporates when the humidity levels inside the humidor reach 70%. If the humidity levels continue to rise, the propylene glycol will absorb any excess moisture, helping maintain the optimum 70% humidity levels.

Ensuring the correct ratio of propylene glycol to water can be difficult when measuring yourself, so it is often easier to purchase a pre-made propylene glycol solution made of 50% distilled water and 50% of the chemical substance. These pre-made solutions are available at most good cigar stores, particularly those that sell humidors. Due to the chemical makeup of propylene glycol, it also helps prevent mould and bacteria from forming inside your humidor.

Distilled Water vs. Tap Water

Never use tap water in your humidifier, even just to wipe down your humidor. It may look and even taste the same as distilled water to you, but tap water contains minerals and bacteria that can cause odours in your humidor, ruining your cigars. The minerals often found in tap water, such as chlorine, can also clog the pores of the humidifier’s sponge, which can prevent correct humidification that will lead to mould and bacteria growth. You’ve chosen your cigars carefully, now don’t let a careless detail ruin your collection.