I really, really want to like this tank. The X's leak-proof design is why I bought it. However, it seems any time I refill the tank, it gurgles. OI can't explain why. I avoid both intake holes of the coil. I don't fill it all the way. I don't tip it enough for liquid to get in the coils. It just gurgles, every time, after refill. I have to blow out the liquid and wipe it down for it to stop. If anyone can tell me WTF I'm doing wrong, I'd appreciate it. After I blow it out it vapes just fine until refill. Both intakes open on full. Any tips?