Step 1
Pour 2 tsp. of baking soda on a damp cloth.
Step 2
Rub the baking soda onto the burn mark on the microwave door.
Step 3
Rinse the mark with water.
Step 4
Cut one onion in half, and rub the burn mark with the flat side of the onion. Then rinse with water.
Step 5
Spray the burn mark with ammonia, if the mark remains.
Step 6
Scrub the mark again with a soft cloth.
Step 7
Wipe the interior door down with water to remove all ammonia. Then repeat if necessary.