It is likely that you are having the same problem (not really...
. ). I have a few BCC (EVOD, Protank MINI.
Protank mini has the stainless steel mouth piece and seems to collect more condensation. After about 1 ml of vaping (appx : 1/2 a tank) It start to gurgle and I clean it out with a small piece of rolled up napkin. Then it's fine until I have to refill.
I have to do that with EVOD only once every refill!
May be you could try different drip tip (not metal) and see if that helps? Loud popping sounds says it has too much eliquid on the heating coil and that could also mean that condensation has dripped on to heating coils.
Cheers.