Hey mate -- I'm short on time to properly explain and this will be a bit messy, but consider lowering your voltage and laying a thin piece of cotton overtop of of the coil. The coil is vaporizing the
eliquid away quickly, and not staying covered... so as the new
eliquid seeps in it encounters the hot spot and goes pop. Lowering the voltage will allow the wicking to keep up a little better, as will playing with the wicking itself (density, etc.) In some cases it can also be condensation from the tube dripping down onto coil, or there being a looot of
eliquid over a hot coil causing stuff to pop up through. And yes, different viscosities do better with different amounts/types of wicking.
Also, I suggest not looking straight into the atomizer while firing it.
