Another arcing video. This one is more similar to what I experienced on one of my lasers when there was heavy condensation on the tube.
https://www.youtube.com/attribution_link?a=SUk3CE-W768&u=/watch?v%3DIW0wm3gxJeQ%26feature%3Dshare
The tube is busted. Right now the effect is is that it’s easier for the electricity to Arc to the case and it is the flow down the tube. I ended up having to replace my tube.