Why does the vape leak oil when warming up?

1. Long time preheating, the smoke oil on the surface of the inner hole of the heating wire is in the state of high temperature boiling and easy to flow, the smoke oil will gather by gravity and seep down if you don’t throw it out the smoke oil in time, the oil will seep to the battery connection for a long time.

2. Bubbling in the oil inlet hole is a normal air pressure characteristic.