CD 12 works great!
Forgot to add that, with these jars, I use a CD 12. I’m a stickler for CD wicks, and only have tried ECO wicks once, and I didn’t care for it. But, a single CD 12, seems to give it a beautiful, even melt pool, all the way down. Not a single bit of wax or soot around the jar! You can’t ask for more than that!