I have a Yocan Falcon I was trying to use with a .0000 SS bed on the coils. It still wasted 80% and burned the coils but that was all. It depends on what you are using, as 304 mesh will never produce any toxins at 200c or below which is what we use. If you are stuffing a "glass antennae" and using a lighter there will be some combustion and smoke of any kind is cancerous no matter the source.