i take nice spaced out draws. nothing severe and i use max air flow which i thought would help. i believe its a problem with the nanos. i mean ive tried everything from changing the coil so blowing through the bottom of the coil, cleaning out the tank all sorts and its still there. spitting and gurgling. when i first set it up it worked spot on for about 50 vapes. now no matter what i do it does it.. and the new tank i have is very very similar to the nano and that also does it... in buying this new tank im hoping it eliminates that as ive heard good things.. itll be just my luck for it to happen again.