Check out the rubber ring ( or called door seal) to see if there is black mold build up inside the bottom rubble. / [9 q/ L. j; M. s; S* d# J( f1 @ 8 w4 {% U j" K& A0 xIf 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.