Kristen
One reason I hesitate to try and address this type of question here is because I just remember how much I hated it when I would ask a question just to get told it was "user error" or some similair thing. But in reality...most issue really are all about how your using the product. Error however is not the correct term....I call it user habits or patterns.
I have learned both from my own experience using all kinds of ecigs as well as talking to SmokeStik customers all day that there are some predictable patterns. And after anywhere from several weeks to a couple months of starting the
ecig thinking that things are not lasting as long as they did....whether that is the charge on the battery or the puffs off a cartomizer....happens to pretty much everyone. As you get more comfortable with the ecig you start using it more and more unconsciously.....you also start forgetting how much you really smoked. Smoking is like food and sex....everyone lies about it....mostly to themselves. LOL
But in order to know if you really got an underperforming box of cartomizers or your
batteries are just wearing out.....we really need to run through the "tech support" routine on the phone....or this will turn into a monster like the burning carto thread!
Another thing that really screws up perception is refilling. Try googling what the scientific defination of "a drop" is and you will quickly see how perceptual all this can be. I don't know if any of this helped you or not....but we would still be happy to talk to you even if you are refilling.