replying to Doc, Toodlesbug wrote:
I can't understand why a bottle of Lime-Away wouldn't work. I'd dump it in
when the tank was about 1/4 full and leave it overnight. Lime-Away sure works
to dissolve crud in a pan I've been adding water to on the stove to humidify
the house in the winter, and it does NOT dissolve metal or glass or plastic.
Just the crud.

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