RE: Alright this is for the engineers, thermacell probs...
i think they all take a couple of clicks to get them lit. I may be just ramblin, but i usually turn the fuel on for a minute and hold it against my jacket in an attempt to store some excess gas in there and then light it.it seems to light with fewer clicks, and holding it against yourself helps to muffle the noise a bit. it's tough to make that much racket in the woods, but the end result (being bug free) is worth a little noise.