Every time someone complains about the protank ll people swoop in and offer up all the quick fixes and analogies to why it doesn't work properly. Well...you shouldn't have to take something out of the box and do anything except start using it. First thing is I don't want to keep my protank "topped off" to make it work properly because I may not want to vape another tank of that particular flavor. So I could pour the old flavor back into the bottle right...No, because it's burned up like any and every juice I put in it whether it's clear or dark or high pg or low pg. I've had 2 protanks for almost 4 months and there's no fixing these things. They're gonna gurgle they're gonna leak on your battery they're gonna burn up your juice they gonna burn thru your coils and they're gonna work great for the first vape of the day after you dry your battery replace your coil and put new juice in them! I put the top off of one of my wifes evods on to my joy tech ego (where my protank used to be) and it works great been using the same coil for a week and it hasn't even started to blacken the wick and the battery last 3 days. I was about to give up on ecigs because though the evod worked ok I could drain the battery in no time but I have found the perfect combination by swapping the heads.