(1) Inhale a Complete Breath.
(2) Hold the breath a few seconds.
(3) Pucker the lips as if your were whistling without swelling the cheeks. Exhale a little air through the small opening with considerable force, stop for a moment (retaining the air), and then exhale a little more. Repeat this exhalation pattern until the air is completely out.
The Cleansing breath can be used any time you are tired. I use this breath any time I have been around smoke or other air pollutants.