Actually Roger, yes, what I do is tilt my head down & squeeze until the sterile saline runs out and YES I do inhale it slightly (very much like that photo) right into my nasal sinus...then lift my head a bit, pinch the other nostril and blow it all out. It is such a simple premise. You're just washing out an irritant from your delicate mucous membranes.
I remember when I was younger and had to cut the grass every week and
it was awful when there had been no rain. After I finished the filthy job I'd get
in the shower -- cup my hands -- fill them with warm water -- lower my head while I inhaled some of that warm water up my nose - then when I blew it out,
out came all that nasty dirt & dust from the yard.