I must not be holding my mouth right or something. I've bought two torches. One from my local shop and another from CI. Neither were too expensive, about $20-$25 I believe. They both worked great when I first got them but then after a refill or two neither will work. I threw one away and the other won't light no matter how hard I try to fill it. I've been using Ronson to refill. Just finally gave up and have been using matches. Matches suck for touch ups though.
I drawered my first two lighters because they stopped working. I filled, disassembled an reassembled, cleaned, and adjusted the electric ignition (a trick I learned with my pizeo backpacking stoves). Nothing! Then after a tip from a BOTL, I learned to clean the nozzle with duster. Both were good as new and still work perfectly. Might be the problem, might not, but it is worth a try.