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. 4 v) Z* T4 O" `0 f
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Solution: turn off water supply and take the humidifier apart and clean it will stop the leaking. : u, V6 q! F- ^8 ^! K0 r, T) Z% u: C/ F @2 C- j# F8 v
. A: o1 y7 u7 ?9 `0 zOtherwise, find a professional or change a new set.