Weird Hantarex Polo problem

[Grauwulf]

I have a Hantarex Polo 25" monitor that is behaving a little odd. It hisses quite loudly and you can see arcing coming from under the anode cap. Now I have cleaned off the tube in the areaaround the anode and I know that the anode is properly attached to the tube, but the problem still seems to be there.  I have gotten it to the point where you can't see arcing any more, but it is hissing like crazy, so I know it is still doing it.

[grantspain]

its sounds like the protective layer is eroded around the anode cap and it is arcing to the dag-if this tube had been lying in a damp place for a while then that would cause it as well,sometimes the anode cap itself can degrade but whatever it is it ain't a major problem to sort
you can purchase a insulating gel for anode caps,trouble is i don't know where or just swap the anode cap from another flyback

[Kevin Mullins]

Is the bare braided "dag strap" still firmly connected that runs across the back of the tube and aquadag areas? (not actually sure what issues that would cause, but worth checking)