I took the oven door off in order to clean the dirty condensate that accumulated on the window glass. Being the handy type, I took the door apart without taking a video, and as I age, my memory isn't what it was, and couldn't remember how to put it back together again. Having Sharon here previously for our dishwasher malfunction, and then our front loader had issues, he was the first of mind to call. Since not all wall oven doors are not identical in construction, and not having taken it apart himself, he methodically reconstructed the door and installed it, and charged us only his base call-out fee.
Needless to say, should my wife bag on me again to have her wall oven door cleaned again [yeah, right...], we know who to call first!