Bicarbonate of soda is the secret to an odour-free fridge, according to cleaning experts at Good Housekeeping Institute.
If the fridge is starting to smell, the cleaning gurus recommend wiping down the shelves with a solution of 15ml (or 1 tbsp) bicarbonate of soda to 1 litre of warm water.
A sterilising fluid would also work.
However to keep smells at bay forever, there's another trick that uses the common household item.
Simply leave an open container of bicarbonate of soda inside the fridge - ideally somewhere where your family won't accidentally eat it.
It will last for three months, so it may be a good idea to date the container so you know when to replace it.
The best way to prevent your fridge from smelling however is simply to clean it often by wiping down all surfaces with a damp cloth before drying with a dry cloth.
The outside can be cleaned with a solution of washing up liquid - but just use a damp cloth on any metal parts.