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. 0 u, Y( p% O' @. `# @3 F : G/ z3 H/ w7 S. y9 T7 M4 `Solution: turn off water supply and take the humidifier apart and clean it will stop the leaking. $ p7 Z" i f% p 1 _/ e' q. s2 {' K! R5 O/ J" t' ~- i# z- N/ s* l
Otherwise, find a professional or change a new set.