Ok guys... this discussion got me curious and concerned...
Take apart more than one of them..I would suggest taking them apart when you're done with them..some are worse than others..these are mass produced so there are variances. That small white piece of cloth is most likely poly-fill and it looks melted..dry it out and see if it burns or melts..the ones in my dual coil burns/melts.
Sure it's only a small amount of melted plastic you're inhaling and it probably won't kill you but if you inhaled it for years who knows (probably still safer than smoking cigarettes). I know one thing there is an extra taste in a polyester filled cartomizer that I don't get dripping on a coil that I've built or in a CE2..it really doesn't taste of plastic but it's something..maybe because it's so little. I have compared them side by side with more than one of my flavors.