Make sure they are filled properly; Boge cartos are not easy to fill because their filler is very tightly woven inside. You have to go slowly and make sure that you put at least 25 drops of eliquid on the first fill (for regular size cartos, more for the XLs). Let them sit a bit to saturate the filler. If the filler is very dense, poke a sewing needle, gently, through the filler to open it up. After that, top off early and top off often. They have to be moist at all times. Maybe lower the wattage a bit initially.