Check out the rubber ring ( or called door seal) to see if there is black mold build up inside the bottom rubble. 5 |4 e b: O7 [$ O1 i0 B # {+ s7 R* V) _. ~! p0 y. M$ c1 OIf 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.