I just checked my e-juice diary (it's not a feelings calendar)
and I did notice that I used the same Ikenvape Fusion LR since 11/30. Much longer than the smok ones. I just changed it out with an Ikenvape Platinum SR using the same juice so I'll see if the Platinums last longer. I didn't notice any inconsistency with the Smok ones, just that the only last a couple of days.