My mother's microwave oven has an unpleasant odor, tainting the food she heats.
About two weeks ago, she heated a cat toy (catnip), to refresh it. She did it for 2 minutes, not realizing that was wayyyyy too long. 20 seconds maybe. It burned and her microwave is now very odiferous.
We boiled baking soda in water yesterday. Any tips, from experts? I cleaned houses professionally and never encountered this one.