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. ) w( c$ ?. F4 A# d* A( y% O8 h, P7 p% X6 }
Solution: turn off water supply and take the humidifier apart and clean it will stop the leaking. , T M5 O" ~- H$ g" o6 K k# v$ _ u$ T; E. H% h5 _
5 _+ m; v& q4 i9 L' ^- yOtherwise, find a professional or change a new set.