I got a recipe from friends on the net, tried it and the cockroaches are slowly going away. 1 cup Crisco 1 cup sugar 8 oz. Boric Acid Enough flour to make it like pie crust dough Make into small balls and place all over the house. It is slightly greasy so don't place it on furniture, wood or any place you don't want a grease spot. Jack Childers in OKC