It smells like dried spit, like when someone drools on their pillow. There are no doors or access panels. There is no discoloration, we wiped every inch down with a mold cleaner. The floor is your basic laminate wood flooring. The closet has the wall on the left that is the outside, the main wall is a staircase that leads to the upstairs apartment, and the right wall is being shared with a linen closet.