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 g& T/ @ `; |' k
4 L. s4 P/ _; v: Q1 JSolution: turn off water supply and take the humidifier apart and clean it will stop the leaking.' f& z( O' r' v6 O y$ E3 E- t7 o
3 o2 v: @2 ?# P) M9 u; l. { 9 V0 d7 A2 M$ F" J' C( b; ZOtherwise, find a professional or change a new set.