The flavor loss I've experienced with filtering coupled with the already muted flavor on even the best cartomizers means I have a lot of flavors reserved for atomizer use only. I've had good luck with restoring flavors with the limited selection of Loranns I find at a local craft store. Sadly they stopped carryng the toffee and the caramel, as usual, is heavily dyed. Gonna have to break down and get more into DIY.