Safe and easy lung cleansing apparatus and method comprising a hollow nasopharyngeal tube with longitudinal misting and air sections inserted in user's nostril, misting means, lung cleansing fluid, fluid and air pumps and automated postural lung cleansing and drainage bed synchronized with the air and fluid pumps, to rotate and turn the user to mist, drain and thereby in turn all areas of the user's lungs. Some embodiments include a cuirass-type negative pressure ventilator to recruit more alveoli for cleansing, loosen mucus in the lungs and induce a cough to clear mucus. The method may include premedication to loosen mucus, tar and other foreign matter in the lungs. In some embodiments, the user's chest could be vibrated to loosen mucus in the lungs to aid thorough cleansing by the misting and automate postural drainage thereafter.