Use Xikar Propylene Glycol Solution with most cigar humidification systems. Xikar Solution will automatically regulate the humidity in your humidor to a 70% RH ensuring a "humidor fresh" smoke every time. Xikar Solution is conveniently pre-mixed and ready for use. No need to dillute with water. . Anti-Fungal agent. Wont plug humidifiers!
This is recommended to fill up your Xikar Crystal Clear Humidifier (shown above).