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. 8 v/ @3 X* y3 H5 b( d" t
; O$ ~' G* u! a% G) bSolution: turn off water supply and take the humidifier apart and clean it will stop the leaking. 2 V5 `9 k. t) {7 O9 u2 w% c ! h6 S" }" Z8 B0 v& ~ 1 Z3 X, v8 M; F" n% f& O7 LOtherwise, find a professional or change a new set.