I just got this tank today and after priming the coil and securing it tightly I filled the tank, waited a few minutes, and hit it a couple times to restore negative pressure. At this point the tank slowly drains liquid into the air intake so hitting it sounds like I'm hitting a bong or slurping through a straw. I am going to try to replace the coil however I feel like it is a defective bottom o-ring? I got this tank after my original Cleito leaked juice out of the air holes quite erratically (sometimes leaking, sometimes not for a while). Does anyone have any tips? Much appreciated.