Hello and welcome to the forum
@IceVaper. Glad to have you here!
Does you coil head look something like this?
Normal. The crackling sound is just the heating of the juice. As long as you keep with wicks submerged in the juice they will wick. When your juice gets low just "twirl" the juice around (or turn your battery/tank upside down) so the wicks get replenished (if you have the ones like pictured above).
If you are interested in learning more about e-cigarettes (and all the parts and pieces) below are some blog posts by
ECF member
@Baditude that I highly recommend for someone new to
vaping.
A "general guideline" for nicotine concentration in e-liquid to the number of cigarettes smoked per day. If you are subohming (resistance under 1.0Ω) cut these nicotine levels by at least 50%.
06 mg = 10 cigarettes or less
12 mg = 20 cigarettes
18 mg = 30 cigarettes
24 mg = 40 cigarettes
eLiquid/Juice
PG = Propylene Glycol - the "flavor carrier" of e-liquid. A secondary source of "throat hit", but not as strong as the nicotine concentration. Some people have a sensitivity or even an allergy to PG. It's very thin.
VG = Vegetable Glycerin - the "vapor maker" of e-liquid. Used as a sweeter in many food sources, and also as a skin emollient. It's very thick. Often labeled just "Glycerine"
PG and VG are often used together in different ratios in e-liquid. For example, a 50/50 PG/VG ratio. Many juice vendors offer a range of different ratios as far as PG/VG.