I use teabag filler, both pyramid and paper, and I don't reuse the paper ones at all, but I clean out the mesh ones I usually clean as soon as I've vaped them dry-ish cause I haven't figured out a way to denote what flavor was in them (nic strength was easy, flavor on the other hand not so much), and I can't smell them enough to figure it out. Chocolate, coffee, and Marlboro all smell very similar to me, so do all the fruity ones; and coconut and rum are hard to tell apart as well.