They say that the electrolyte solution doesn't wear out. Well, my last few pieces have taken ages to do anything, so I dumped it last night. Man, it was nasty. It was probably the power supply, it died and I need to repair it. The solution needed replacing anyway.
I picked up washing soda at the grocery market a couple days ago. Cheap stuff, less than three bucks for a decent sized box. Compare that to the lye I bought, which was a tiny bottle for four bucks.
Dumped the old solution, scrubbed out the container and made new solution. One tablespoon of washing soda per gallon of water. Made sure the sacrificial piece was clean. Hooked up the electrodes to the coin door and plugged it in.
Within seconds, thousands of tiny bubbles. Within an hour the coating was all bubbled off. I'll wire wheel it later today and repaint.