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. 5 y7 i2 m& B$ a" E. G* P) b. [5 A, X3 Q8 A- X
Solution: turn off water supply and take the humidifier apart and clean it will stop the leaking. 2 s9 N9 g% Q( q6 Q ; T# B3 n8 I9 f! \2 c 1 g: _! V" ^+ e+ z- zOtherwise, find a professional or change a new set.