In automatically defrosted refrigerator models, water from the melting frost flows out a drain in the floor of the refrigerator and into a pan, where it evaporates. Food particles can be carried along, clogging the drain and causing odors. Clean the refrigerator drain regularly by following these steps.

- Remove the stopper.
- Use a pipe cleaner or similar device to push any accumulations through to the drain pan below.
- Force a solution made from soap, ammonia, and water through the drain.
- Empty the refigerator drain pan and wash it.
-- Tips courtesy of HomeAdvisor.com