Check out the rubber ring ( or called door seal) to see if there is black mold build up inside the bottom rubble.: s9 S* R) B# J9 e. A- _
8 h3 U+ a" |# k9 u$ e( k G
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.