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. / D, B5 I4 j, h: U( A8 v+ R* t5 P- v$ J
Solution: turn off water supply and take the humidifier apart and clean it will stop the leaking.1 n0 j Y, O `
4 ?) X' f1 f# Z9 U# A$ S & ]# M' ~& {+ p! [7 N2 n1 ]Otherwise, find a professional or change a new set.