I am having a hard time getting the menthol smell and flavor out of my cartos. I've tried cleaning them with rubbing alcohol (left a nasty taste) and bioling them for a few minutes in water. No matter what, the smell and slight taste of menthol is still stuck in the filler. Are there any tricks that I haven't found yet, short of buying seperate cartos for other flavors? I want to experiment with some fruit flavors and that minty undertone just won't cut it.