Did you measure the scent and the wax , depends on what kind of gel i use mp and i use up to 5 percent per pound of gel. If its over scented when you burn it will have a lot of black smoke. I have done this many times before someone on here helped me with it. If theres to much fragrance oil i would toss it and start all over by measuring the fo and the gel. I mix in one metal pot and then pour into a heated glass, works better that way for me.