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. , B6 f' r5 Q6 E% S6 t) H% W0 a
! o: B V9 T9 O& K1 `Solution: turn off water supply and take the humidifier apart and clean it will stop the leaking.+ X9 v* e3 T5 F0 @$ ~$ M: Z8 M
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; c0 [7 j+ u Y0 eOtherwise, find a professional or change a new set.