If you own a Humi-Care EH Plus, you know what a great job it does keeping your cigars in top condition. Its "set it and forget it" ease of use simplifies your life. Here's a way to make things that much easier. This replacement cartridge for the EH Plus allows you to have a fully charged cartridge at the ready whenever you notice the need for a refill. By having a spare on hand, you'll be back up and running in less than a minute.