A deodorizer cannot fix a refrigerator that still contains the source of the smell. Remove the source first, clean the interior, and only then use an odor absorber.
Find the source first
Check open containers, produce drawers, leaking packages and the drain area if it is accessible according to the manual. One forgotten item can overpower the entire refrigerator.
Wash shelves and gaskets
Remove accessible shelves and drawers, wash them with warm water and mild detergent, and dry them fully. Wipe the door gasket and any areas where liquids may have spilled.
Baking soda absorbs; it does not replace cleaning
An open container of baking soda can absorb some odors over time, but it cannot replace cleaning. If the source remains, the effect will be limited.
When the appliance itself may be the issue
If a clean refrigerator smells burnt, chemical or like overheated insulation, stop using it if safe and contact service. Those odors should not be masked with fragrance products.
Bottom line
Keep the solution simple: start with the most likely cause, change one factor at a time, and observe the result. That makes it much easier to identify what actually works in your situation.