This is my issue. When trying to vape the hole on the carto for my j-tank I can see the coil in the middle of the carto shine bright red. And when vaping the taste of my e-liquid is not there. I get this real intense burning flavor that i'm starting to believe is not safe at all. The first set I bought had the same problem and I emailed the provider and he sent me a new set but it seems to be the same issue. I'm using a mini lavatube and i've been having trouble finding the right carto for my j-tank to use. I love my mini lavatube but I just can't get a break...Help maybe with fixing the cartos i already have or any suggestions of what works best for High vaping on my lavatube.