Check out the rubber ring ( or called door seal) to see if there is black mold build up inside the bottom rubble. 9 i: R2 T3 N6 L2 r+ P) D' k " s `" _3 r# k, ?" pIf 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.