Up to 2 million dust mites share your double mattress so if you suffer from allergies or are one of the 40 who report feeling bunged up in the morning heres a serious solution that can eradicate dust mites from mattresses upholstery and carpets unlike chemical sprays strikeback killer spray is water based and odourless so it can be used safely on delicate surfaces for more serious problems the fogger is a professional product now approved for amateur use place on a saucer and light