so I have one sapphire left that I haven't changed the wick and its the only one that I end up having to blow out because the coil is flooding with juice. I think these wicks aren't quite up to the task. the other ones modded with ce2 wick aren't flooding like this. I'm smoking these with real 3.7 volt batteries and I charge the battery at work so its always topped up. so its not like the battery is getting weak.