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Okay, time to tackle this M7000.

First thing you'll notice is this seeping gunk by the anode. In the 1970s and early 80s, they made these out of some kind of rubberized plastic material. It breaks down over the years and gets all sticky and awful.

Lots of people see this and think the tube is leaking or something. It's not, just the rubber breaking down. After discharging the tube, you can clean it up with isopropyl alcohol.