I don't have alot of experience with carto tanks. I have this dual laser hole smoketech 1.25 ohm carto that keeps flooding. I have it snug in a tank using TV cherry cola (wonderful). The PG/VG ratio is 70/30. When I stop using the tank for a while then go back to it the carto is gurgley and liquid fills into the 510 connection. I blow the juice back through the male 510 threads and after a few hits it is nice. But every time I put it down when I come back it's the same problem. What is the problem? 
