Eco wicks, for me, burn certain oils that clogged/drowned every single other wick I tried. I have an oil that has some myrh in it, in which I tried every wick on the face of the earth (HTP, CD, LX, FW, Premier Series Wicks, Fil Tec, Cotton, Zinc...you name it, I tried it). Not a single one stayed lit (in any size I tried), except for the Ecos.