Wipe the walls of the freezer with a cloth soaked in a mixture of vinegar and water or ammonia solution. You can leave it in the freezer for a few hours tissue soaked in vinegar. Absorbs odors soda and charcoal. Put a box of these crushed substances in the freezer and change three times a month.
Another option is to place a glass of baking soda dissolved in water. To change it you will need on a weekly basis to unpleasant odors are not absorbed back. Try also to put in the freezer for a few tablets of activated charcoal - natural sorbent absorbs liquids and smells.
The walls of the freezer can be cleaned with lemon juice or put sliced citrus. Also absorb the smell of black bread, turmeric, Basil, cloves, thyme, celery, orange peel and rice grains. You can use onion and garlic: grate wall by them, then well ventilate. Try to put in the freezer the vanilla pod, slice of Apple or a leavening agent.
Cut any citrus fruit in half, remove the pulp and pour it instead of soda. Place in the freezer, and after a few days remove, the smell should disappear. Another method: squeeze lemon to the water and put in a container in the freezer for a few days. The freezer first wash detergent, and then with a strong solution of soda.
Means of struggle with unpleasant odour, mi, offered by the manufacturers of household chemicals, it is worth noting the special odor-absorbers need to be replaced every few months. They effectively ozonated internal space of the freezer to absorb odors.