When using fish attractant with tubes, insert a piece of cotton, or packing foam through the bottom, and push it to the top of the tube, before rigging Texas style. Once the hook is inserted it will hold the "scent holding" material. Now scent can be applied inside the tube, and it will hold much longer. To help in this process, use something like Kodiak's Crawfish Paste which comes in an injector, but don't over fill the tube, as a little will last a long time.