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. ! y, G' u( H5 k8 l! U; ~3 J7 U
7 w- }7 o; g$ j( i* T$ K1 I0 U' | u0 iSolution: turn off water supply and take the humidifier apart and clean it will stop the leaking.* U. E' O6 z! ?: H r' ?. C
1 U0 V# J7 F- s3 e/ g. ^* i ( o' {4 e: g0 ~; U$ ZOtherwise, find a professional or change a new set.