My husband removed the screws that held the top of the stove on and then lifted the top up. It is hinged. He then took out the old insulation, wiped down all visible parts of the interior with a bleach solution and replaced the blanket insulation with the new insulation. That took care of the problem!
The light apparatus was loose behind the panel. Remove the remaining part of the lens. Install the new lens from the outside of the panel and hold it in position, protruding into the inside of the panel. Slide the light apparatus onto the lens from the inside, allowing the bracket to hold it in place - it will be spring loaded, which will hold it in place.