A friend I'm visiting has a European Metz gas stove. Everything worked fine and 3 of her burners still work fine but after she washed the burners, the big one doesn't work right.
The burner looks spotless, crumbless, dirtless, and totally dry.
The sparking starts immediately but it takes much longer to light than the others, and then there is a big flare. After that, the flame is still bigger than it should be and turning it down doesn't make it smaller until all of sudden it goes out.
The stove is out of warranty, and this is the woman who lives in the sticks, far from repairmen.
I've looked at
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none of them seem to apply.