I've been vaping old school (carto tanks) for years. Finally went and bought a Nautilus 2 tank Saturday used the 1.8 coil, and once I got it sent up properly, OMG the flavor was just amazing! Instantly fell in love (even though the tanks is so small it requires constantly re-filling it). So the tank vaped flawlessly through Saturday and all day Sunday. Then Sunday evening the flavor started to fall off. and then suddenly DRY HIT. WTH? I emptied the tank, took it apart, and studied it carefully I really could not see anything wrong or gunked up, so I put it back together. Took a hit and the flavor was back. But 5 hits later, and dry hit again. Repeated the process, and got the same results. So WTH is going wrong? Why did it vape perfectly for 2 days, and then suddenly dry hit becomes the norm? I didnt change juice, so it makes no sense that it would wick fine for 2 days, and then suddenly it wont wick at all. I really love the vape in this tank, but now I'm back on my trusty carto tank until I can determine what is going on. BTW, if anyone knows of a larger tank that can achieve a stiffer draw like the Nautilus 2 is capable of, let me know.