Check out the rubber ring ( or called door seal) to see if there is black mold build up inside the bottom rubble. 4 K& R5 `9 ]4 |0 E) k- v/ k4 \; D) _2 P% m# 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.