A 1) Check whether the LED indicator of the device is red. The red light indicates that the battery is too low and should be charged in time. 2) The flavor of e-liquid that is being used is weak. It is recommended to try another e-liquid. 3) If the e-liquid is not used for a long time after being filled in the pod, the flavor could be bad, especially for the first few puffs. You can shake off the e-liquid out of the airway before using it, or replacing the e-liquid in the pod.