So i just made my first RBA. Its a single coil, some japanese cotton, nothing fancy. Im using the pre-set deck that came with the Kanger Subox Kit and when i use it, it crackles A LOT. Is that normal? Other than that its fine, flavor is pretty good and it produces a good amount of vape. It just crackles and makes a lot of sound. Is that normal? Also, i see vapor coming out of the airflow section and the bottom of the tank...is this bad? Im new so i feel really dumb for not knowing. Any help is really appreciated. PS. Im vaping on 25w and its reading it at .5 olms