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. + Q1 X, F0 c9 V# L 2 z% H) M7 ~2 w5 i% KSolution: turn off water supply and take the humidifier apart and clean it will stop the leaking.: \; g& s( b& g( ], f/ U
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Otherwise, find a professional or change a new set.