not sure what happened to my post, lol. These pillars are small, so the lx12 is perfect. I know wax changes, but I've never had this happen with this wax and I've used it for a very long time. The proof is in the pudding, lol. Made 2 identical candles, one with new 1343, one with some left from previous purchase. The lx12 burns like a dream in the old wax, but won't even stay lit in the new wax. Even tried a 60C, htp105, and eco 12--barely stays lit in the new wax. So, I'll just have to make wickless candles with the new stuff. I guess I should contact the supplier or igi just let them know what is going on, but it's always 'our' fault, not the manufacturer.PamR