I have just started using Sketchup. I created a window and did an offset. I used push/pull and it snapped to something. I retraced the lines and I moved the wall out of the way where the windows were, and now there is a floating rectangle which I can not select or delete. I also tried retracing all lines, push/pulled all services, used the select arrow tool and highlighted the whole object and it still wouldnt delete. I rotated the view to select from a different angle (and not impact anything else, still nothing). Also, I cant find the object in the object tray.
What am I doing wrong.