Hi, I'm a newbie vaper and one of my Aspire nautilus tanks is gurgling and I'm getting pretty much no vapor from it. I've only been using it for like 2 days. When I vape on it it's like a gurgling sound and feel to it. And it's also kind of making a popping noise. I've tried adjusting the airflow to different settings but it's not fixing it. Do I need to change out to coil or is there something else I can do to fix this???