ok so im having some carto trouble. im using the smoktech dual coils in an m1a1 buzz tank on a vv box mod. the way i fill mine up i usually put about 20-25 drops in it fill my tank up and let it set for about 15-20 minutes and the last couple that i have used ive been getting a burnt taste for some reason. should i fill the cartomizer up completely then let it set? or could i possibly be using it at to high of a voltage starting off or what?