If I have a spit or a burn, I look for one of two problems. One, a hot spot and for those I generally just bite the bullet and start over. Some times "strumming" the coil with a very small screwdriver fixes the problem. For spits, I know that my wick does not have good contact with the coil. Most often this is one of the two end wraps. I shove a little more stuff in there and that usually fixes that.