This never effected me much years back..  but  latley  ive noticed i get a minor headache  when i torch 

some spice with a butane lighter  ..especially  if i use a small closed  glass  bong...

But when I vape with an electronic  direct Emesh...  i It feels  and tastes  cleaner.. and smoother.. ..with no headache  at all!

I know that  butane lighters  put out carbon monoxide...and carbon deoxide...

has anyone  else noticed the difference im talking about  with the two vaping methods  with spice ?

any opinion welcome...