Bedroom secrets revealed: how often do we change our sheets?

Sarah Coles
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washing machine for allergies

DPA DEUTSCHE PRESS-AGENTUR/DPA/Press Association Images

An alarming new study has revealed that almost one in four people fail to change their sheets often enough. A combination of laziness and the desire to save cash on laundry means that we're languishing in our sheets for longer.

But just what is this penny pinching costing us?
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