REFILL INSTRUCTIONS FOR THE VITAL CARTRIDGE
To fill your cartridge, follow these simple steps:

- Unscrew the base from cartridge and battery.
- Hold Vital Cartridge up-side down.
- Use your refill bottle/liquid bottle to fill the Vital cartridge along outer wall
- Reconnect base to cartridge then battery.
Do not fill liquid in the center of the cartridge. Its designed to allow airflow.