In a bundle of strands, tie a string and place it down on a loop. You can also use an extra thread, which is easier to put on, because the loop can be placed in the desired position. Two. Many times since then wrap up tie and all the other threads with the long end of the thread. Becomes tight and uniform. 3.Pasar the thread end through the loop. Stretch the other end of the floss up and while pulling slightly downward spirals. The upper end is hidden in the bundle of wires.