I have a 2 teenagers at my apartment for the holiday break. They've just informed me that someone, perhaps a maintenance guy came to clean the a/c unit. Who was this and why? I'm asking why because Walter addressed and corrected this work order on this past Friday. This is very upsetting as I was not aware of any visitors today, especially having kids there without my presence. They are aware of not answering the door for strangers, luckily my mom happened to stop by and opened the door for this individual. Are the work orders not updated when completed????