I bought a 3ml smoktech udct tank/carto to try. I thought the tank was 3ml but its 1.5ml and the carto holds 1.5ml. Newbie mistake. Anyways, I primed the carto and filled the tank, but after about half a day of vaping I got a burnt taste, and realized the juice level in the tank wasnt moving (the tank is frosted, it was hard to tell). Is this just a defective carto? or am I doing something wrong? I did change the drip tip, but I didnt think that would affect the carto.