If you are having problems with gurgling or flooding here is a tip for you.
When your charging your battery put your atomizer upside down and leave it there over night. This allows any condensation to dry up instead of going into the coil which can cause the gurgling and flooding.
When you put your atomizer back on your battery let the liquid go to the bottom to cover the coil and then vape away.
I put all my bottom coil atomizer up side down in a cup when I am not using them and found that I never have a problem with gurgling or flooding.