A must-have tool when doing intricate soap designs. Fill the injector tool with melted soap base (you easily do that by placing the tip of the syringe in the melted soap and pulling back on the syringe). Trim the tip about 1/8 to 1/4" to allow the soap to flow freely when pushing on the plunger. Some Tips: The secret is to work quickly so that the soap does not set up in the injector tool. Heat up a measuring cup filled with water in microwave (to boiling). Keep the boiling water on hand during your soaping project to clean the plunger. Draw in the boiling water and then expel. Do this a few times until the plunger is clean.