Hmm...the kids swear they had nothing to do with it.
In any case, the good news is that when I popped out the foglight bezel and removed the foglight, there is a small hole in the top that I could stick my finger in and press upwards to try and reseat the nozzle. The bad news is that it appears to be held by some adhesive tape on the inside of the bumper and it seems to have just "given up". It's two months old, so I will try for a warranty claim.