In article ,
roger wrote:
A friend asked me to look at his house wiring because green stuff was
oozing out of L & N at most of the 13A sockets in the house.
He wasn't kidding - it's like Lyles Golden Syrup, but bright green
instead of golden.

Verdigris. It's corrosion of copper (and brass) caused by damp. Loose
connections causing electrolysis will speed the process.

--
*Why do overlook and oversee mean opposite things? *

Dave Plowman London SW 12
RIP Acorn