Actions: If your atomizer's cotton is not correctly soaked it will produce a burnt taste. Prime your coil by dripping a small amount of vape liquid onto the cotton which is visible on the outside of the atomizer (the water drop-shape holes). 

You can also place a few droplets on the inside walls of the atomizer to ensure the cotton fully soaks. Then, fill the tank as normal and wait a couple of minutes before use.

2# Cause: Dry burning
3# Cause: Too high liquid viscosity
4# Cause: Not enough time between puff for liquid supply
5# Cause: Wrong Liquid type