Check out the rubber ring ( or called door seal) to see if there is black mold build up inside the bottom rubble.- S; x( z- j7 T
6 t" g' t1 M# C. e/ i+ \+ h% M2 p/ y M
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.