The trickiest limerick this week was the fourth and final one. Since it got rushed a little and hinged on an especially cunning bit of word play (well, it's cunning if you're in junior high, as Carl pointed out), we're going to cut the radio listeners some slack and re-play it here, so you can play along at home. Fill in the blank with the word or phrase from this week's Oregon news:
Want to wash your car, but it's too hot?
Just pull up to this watering spot.
But beware of the gunk
From that elephant's trunk--
You may think that it's soap, but it's __________ .
(Answer in the Comments below, or in this week's Spanning the State.)