Dealing with dust mites Some bedding cannot be washed and so if you want to continue to use it and want to reduce the impact of allergens, it is advisable to use nanoSPACE protective covers. When you wash standard bedding that contains dust mites and their allergens, you can only boil them. In this way however you cannot get rid of allergens. Boiled mites and their allergens remain in the bedding. Allergens can pass through normal bedding and can continue to cause allergic problems. With the nanoSPACE protective cover, no passage of dust mites and their allergens from bedding is possible.