I havwe one which plastic can filled up with water (not just humidity, actual liquid water)
http://www.lighting-gallery.net/gallery/displayimage.php?album=2096&pos=18&pid=57169An ignitor does not have to be any more complex than that, i seen ignitors that dont have the coils at all too. If the worksmanship is tacky thats another question
What really does look tacky to me is the "circuit board in the open" sort of ignitors i seen in some online pictures (none in real life yet). Those look quite unreliable (easy moisture/insect damage) and not safe