What should I do if there are unpleasant odors in the refrigerator?

Switch off the appliance, remove all food, and clean the inside thoroughly. Clean all packaging and seal strong-smelling food to prevent odors from forming. Switch the appliance back on, store food again, and check after 24 hours if the odors persist. If they do, change the odor filter by opening the filter holder with a slotted screwdriver, removing the used filter, and replacing it with a new one.