1. Remove the tank from the battery and turn the tank upside down;
2. Unscrew the Airflow base and carefully set the tank aside;
3. Unscrew old coil unit and replace a new one;
4. Please soak the new coil for a few minutes before vape.
1. Place the TOPTANK EVOD in vertical with drip tip on top.
2. Unscrew the top cover anticlockwise. Fill the tank but ensure the liquid below the middle stem and ensure no liquid spilled into it. Otherwise liquid may leak into mouth.