How exactly do you know that it's time to refill and/or replace your cartomizer? I have been under the impression that cartomizers can be refilled indefinitely until the atomizer coil breaks. Likewise I have been under the impression that if it doesn't taste like burning and you are still getting vapor then it doesn't need to be refilled. However I have read a number of threads on here that seem to suggest that maybe I am understanding this wrong. Also suspicious is that I have been using the same cartomizer for the past three days now (with a level of frequency that has to have exceeded a pack and a half of analogs by now) and I'm still getting vapor and it doesn't taste like burning poly-fill.