CSN wicks are a completely under utilized wick line and definitely worth a try. I have long wished for an Eco-18 because the jars I use are just a bit too wide for the Eco-16 to give a full melt pool with heavier scents in soy. I hated to have to double wick some scents and not others, so after much trial and error with alternative wicks, and after consultation with customer service, I have found that CSN-26 is answer! I get a consistently great burn all the way across the jar with very little mushrooming even on the heaviest scents. The only time it gets smoky is if I haven't trimmed it properly, but I can blow it out, trim, re-light it, and it is perfect again. The size jar I use is comparable with the salsa jars on this site- a little wider than mason or jelly jars.