When Bob gets trapped out on his patio after the sliding glass door gets stuck, he resorts to writing HELP on the door. But he couldn't have done this as the foggy side would have only been on the inside part of the glass. The outside part where he was should have been cold and dry.
When Bob and Emily are suffering from the heat in their bedroom Bob tries to open the window that is above their bed. But given the arrangement of their apartment, this window would have opened out into the buildings hallway.
Bob and Emily could have opened the porch sliding door to cool off the apartment when it was too hot and their bedroom window could not be opened.