Check out the rubber ring ( or called door seal) to see if there is black mold build up inside the bottom rubble. / U+ @( O* ~7 U1 a5 H- M( @3 F4 o0 j- ]4 ]
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.