CD wicks are self-trimming and designed to curl when burning. So they're doing what they're supposed to be doing! notice the dark brown (paper) braid in the wick? On one side it seems to point down, on the other side, it seems to point up. The wick will curl towards the side where the braid is pointing up. So when I set my wicks, I put the wick slightly off center so that the flame over the curl of the wick will be centered and I get an even melt pool.