Gurgling is a phenomenon that can occur quite regularly on a clearomizer. You get the impression of bubbles on the draw and sometimes even liquid rising up. This phenomenon occurs most of the time when filling and means that the coil is flooded. In other words, there is too much liquid on it and it cannot vaporise properly.
The easiest way to get rid of the overflow is to shake your e-cigarette upside down like a thermometer. The overflow will be evacuated and you can resume normal vaping.
