Check out the rubber ring ( or called door seal) to see if there is black mold build up inside the bottom rubble. + P: U$ x9 k- G/ u$ v5 A - m+ Z8 T7 B8 F, @5 h. e: ~If 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.