Im pretty new to cartos and have had good experience with them. After hearing all the good reviews here For ikenvape I got some. With the other cartos it's been prime, put in tank, fill tank and vape away. With the ikenvape it was prime, put in tank, fill tank and vape away. Let them sit for a couple of hours while I had something else on the mod and then burned filler taste. They worked before. What am I doing wrong