Check out the rubber ring ( or called door seal) to see if there is black mold build up inside the bottom rubble.; q+ j* o% ]& V2 S* O# Y8 F
$ p) x* }- E0 E. R, V2 sIf 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.