We get the same petroleum like smell using a match too.
I figured the lighter would give off something BUT I don't get the same smell when I use it on ice out of the frig. Of course Ice and snow are very different structure wise. maybe being denser and as such ice melted by lighter gives off a good bit of water the water absorbs the smell of the lighter and or match and it goes down the drain in the sink.
Where as the black stuff on the snow stays there and keeps stinking..
Does it smell like sulfur at all or just plastic?