This 4 oz. XiKAR Crystal Clear Humidifier is the clean and easy way to keep up to 150 cigars factory fresh. Just unscrew the top, place it in your humidor, and it will steadily release a constant RH of 70% (on average) for up to 90 days. When the crystals shrink, refill it with XiKAR PG solution.
Xicar makes products that work well
I purchased this item because it stated it would Always maintain 70% humidity. It will not go above 65% in the dry winter air. I contacted Xikar customer support and they said it is working correctly due to the dry winter air, and no product would go above 65%. I have had other products that provided 70% in the winter. All of their literature says 70% is the best and that this product will do that, but that is obviously not true, regardless of how much solution you add.