I wanted to heat up my Lee 20 pound pot so I could remove the PID probe that was hard set into the soild lead.
Instead of plugging in the PID and letting it monitor the temperature, I had a brain far# and plugged the pot in directly set it to full blast, and went and did something else and totally forgot about it.
When I returned the lead was bright red with a yellow crunchy substance on the top. I did plug in the PID just to see the temperature and it was over 900 degrees before I removed it. I didn't want to damage the probe.!
I scooped out the yellow stuff and drained the lead to be thrown away. Once the pot cooled I wire brushed the interior as it was coated with a yellow powder.
Once clean I turned it back on and melted an ingot. Everything seems fine.
These Lee pots are some rugged little buggers!