Check out the rubber ring ( or called door seal) to see if there is black mold build up inside the bottom rubble. . T6 r# z; K0 e( t: \- ^! T% s 6 M4 W" j5 h1 yIf it does have mold and can not be wipe out, then you have to change out the whole seal.. I bought a new seal and changed out few weeks ago.