Ensure that your refrigerator’s seals are fully functional and don’t leave the refrigerator doors open for too long. Refrigerators turn themselves off when they become cool to save energy, but when the air inside them warms, they switch on.

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Regularly defrosting your freezer can massively improve its efficiency. The ice that builds up becomes an insulator, reducing the effectiveness of the freezing process. Also make sure you use the whole of your freezer, rather than leaving it only half-full.

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