just remember this is not a cigarette, you only need light draws. a lot of first timers take heavy draws like a cig and flood the tank and battery. theres no draw back system so the extra juice stays in the tube.
if it starts to gurgle, take the tank off the battery and blow the tank out from the top. not a huge problem but can be if you let it go. wipe out the bottom threads and wipe off the juice on the battery.
after smoking for 23 years, I was up to 2 - 2 1/2 packs a day, it was awesome to feel better and I got my taste buds back lol