Unplug your freezer and remove all rotten meat and other items and seal them in a plastic bag before throwing them away. Wipe up any leaks with paper towels or rags.
Pull the shelves, ice tray and drawers out of the freezer. Wash them with hot water and detergent and rinse them with bleach diluted according to the label's instructions. Let the items air-dry. Do not put them back in until you are ready to turn the freezer back on.
Clean the inside of the freezer with hot water and baking soda. Make sure you wash all of the interior, including the corners, door and gasket. Rinse the inside of the freezer with diluted bleach.
Leave the freezer door open for at least 15 minutes to let the bleach solution dry and help air out the freezer. If the odor persists, leave it open for a few days.
Fill a shallow bowl or tray with baking soda and place it in the freezer. Close the freezer door for at least a day to allow the baking soda to soak up odors.
Dilute vinegar to half-strength with water and wipe down the interior of the refrigerator with the diluted vinegar solution. Vinegar removes mildew and odors.
Roll pieces of newspaper into long rolls and stuff the freezer with the rolled pieces. Close the freezer door and remove after a few days.