"bryanska" wrote:
All I can think is that someone got sloppy with antioxidant.
There shouldn't be anything else greasy near a circuit box.

What do you think about rain? I wonder if rain got into the box, and
diluted the antioxidant paste, and pushed it out.

Pop off the cover of the break box and take a look-see. Any significant water
ingress is going to leave lots of signs (stains & corroded connections at the
very least).