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. 9 a3 e' L4 J1 g" p! W6 ]
9 e3 M; I8 K$ H' |# D L1 bSolution: turn off water supply and take the humidifier apart and clean it will stop the leaking.; l$ Z$ b! x Q6 P& A6 J9 w
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Otherwise, find a professional or change a new set.