It is possible that the shut-off valve was blocked by the cumulated white stuff. As a result, water supply can not be stopped even when water level is high. 6 q- [7 M% L. c4 ]
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Solution: turn off water supply and take the humidifier apart and clean it will stop the leaking. 0 [" K1 k4 g$ f) h: @9 J, X% B, J& X, w
) h2 A. H- B& XOtherwise, find a professional or change a new set.