Your success in replacing the glass depends first on your ability to remove the door. It helps to have a large enough space to work with the door. remove the outer screws and be very deliberate in the disassembly and reassembly of the door. You won't necessarily need to totally disassemble the door to replace the glass, but make sure you pay particular attention to how the insulation lies in the door (especially if your oven has self-clean option). A lot of times, the insulating "cord" just lies in place, and can be frustrating during the reassembly.