Save yourself a lot of hassle and frustration buy never purchasing another Kanger tank.
yeah too late

, anyway i use back the bottom coil , the second coil was a PITA to fit in , forsake the damn second wire ,
change the wick to cotton , screw it on , now it doesnt gurgle or that funny crackle sound ,
best part is just that extra coil wire and they name it pro tank 3

, lol they should made a built in heatsink or something cos it run too damn hot on double coil