Once you have cleaned your fridge and eliminated odors, you may be able to prevent smells from reoccurring with the following:
Keep all foods tightly wrapped or covered
Clean up spills and messes right away
Clean the refrigerator and freezer about once a month
Organize your refrigerator, freezer and all shelves and drawers so items are easy to find and keep track of
Throw out spoiled or expired food
Clean under the refrigerator, making sure to remove anything trapped under it
Some Maytag refrigerator models come with an air filter which is 15 times more powerful than baking soda at reducing common food odors inside the refrigerator. If your refrigerator has an air filter, regularly replace the filter based on the indicator tab or instructions in your owner’s manual