My aspire nautilus mini is not working right. Ever since I changed from the 1.6 ohm coil to the 1.8, I have been having problem with it getting juice in my mouth & producing little to no vapor. I am using the aspire cf vv+ and even on 4.3v to 4.8v it makes no difference. I just got the tank a week ago and I have tried cleaning it, letting it dry. nothing helps. please give me some kind of information so I can fix it. also I don't know if this will effect it, but as I unscrew the bottom to refill the tank. my coil does not unscrew.