Inhale through your mouth until your lungs feel full. Swallow. You are not really swallowing anything but it seems that without this act, it doesn’t work. Do not let any air out. Inhale some more until your lungs feel full again. You may not be able to inhale a lot it will start to get difficult to do this as you go, but keep trying. Swallow again. Do not let any air out. Repeat steps 3 and 4 (inhale and swallow) until you cannot swallow again.