BobG wrote:
I heard tales that they would refurb tek scopes by washing them in
distilled water. The HV static electricity attracts dust, which is
conductive to some degree, and causes arcs and sparks. So hose it down,
give it a few minutes with the hair dryer, and if its as good as new,
it might last another couple years. Good luck. Unplug it first.

THat suggestion is surely a mischievous one. If it's 12 years old, toss
it out. The tube will be thoroughly aged by now. This is nature's way
of saying "buy a new monitor".