I'm using a JOYE306 and JOYE510 - also known as a janty stick, it came with a package of 50 menthol 24mg prefilled carts. I have 4 attys, 4 batts (2 manual and 2 automatic). The old atty's i used to have didnt have this dental floss type of stuff. The one atty that i did pull the dental floss stuff out of, wasnt connected to anything, it seemed like it was just stuffed in there, maybe it was there to protect the wiring? or maybe it was there to act as a sponge to soak up liquid and keep the atty moist when inhaling.