As a medium DYI I took door off and looked at several small screws around door frame. Glass was removed easy and cleaned. While putting it back together I did not align the two top holes in glass where handle screws fit. Tightened and bang, the front outside glass broke. Ordered replacement and when arrived it only required me slowing down and assuring glass was set in the top handle holes and screws put back in. Took 15 min and door back on oven.