Use the cap off an old aspirin bottle or something similar and put two or three drops of the x2 in it. Then dip a toothpick in worm oil or softener just enough to get a tiny drop on it and stir it in well. Do this one dip at a time and only until he colorant is slightly more fluid. You don't want the colorant runny or you'll really have a mess. Be certain the heat is out of the belly pours too before dotting the color on the bellies.