He was trying to fix a console board without proper gear. Next thing we know, the smoke detector is blaring! We still give him grief about it.
I tried no-clean flux on a PS4 HDMI port fix because everyone online swears by it. A week later, the console came back with a new short from flux residue under a chip. I lost money and time redoing the whole job properly. Now I clean every board with alcohol, no matter how many people say it's fine.