I am new to this but loving it. My eyes get glazed over when people talk about all the technical builds, so I am quite the noob. I am using a Kanger IPOW 2. It's been a week of vaping, and the last day or two I am noticing when I take a draw, I hear and feel a crackling and popping that I didn't notice when I first started. Also, the device feels a little hot sometimes, although I admit I am vaping a LOT more since I have some delicious juices now. What's up with that?