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. ( N9 H t: e, E/ z
8 A9 U7 D0 P% Q& b6 x1 v }Solution: turn off water supply and take the humidifier apart and clean it will stop the leaking. * ]* [$ j! x1 ]( Y( {2 j ' [8 `; t; L) w+ c3 A6 g6 Z " l( F& K* {% cOtherwise, find a professional or change a new set.