In my town, doctors refer to it as the “Denver drip,” but of course the “Chicago crud” or “Manhattan mucus” serve just as well. In fact, that decidedly unpleasant, back-of-the-throat, thick-as-molasses post nasal drainage is simply your sinuses, endlessly trying to empty themselves. What with clogged heads, tickly coughs, constant nose blowing, and voices perpetually needing a “harrumph!” to clear them, it’s little wonder that sinus sufferers are willing to undergo repeated surgeries for temporary relief. Or borrow somebody’s old antibiotics. Or fantasize about plunging a Craftsman power drill up their nostrils.