We spend up to a third of our lives sleeping on our mattresses. Most people do not realise that their mattress is probably the most dirtiest object, that they come into close contact with. It makes no difference whether a mattress is six months old, or several years old, the problem remains the same. Up to 2 million dust mites are found in the average double mattress. They each produce 750 times their own body weight of excrement during their short life span. You breathe this in during the night and as well as being unhygienic, this can cause or aggravate the symptoms of Asthma, Eczema, Hay Fever and other allergies .