Melt the chocolate/candy melts in a microwave-safe container or food bag, in 30-second increments in the microwave (or according to package directions) giving special care not to overheat the candy as it will become too thick. If the candy is too thick, add vegetable shortening or coconut oil in 1 teaspoon increments, up to 1 tablespoon, and stir well. Do not add water or any other type of liquid as the candy will seize and harden and be unusable.