Last night I found a little present waiting for my in my closet (see picture). I immediately called my apartment complex and they sent someone out this morning to take a look. He claims that this is dirt. However, about a year ago there was a mysterious wet spot in this exact spot. It doesn't really smell.
So, TQC is it
He said that he will send a steam cleaner out to come clean it. Should I ask someone else to come take a look before that?