A dirty pillow is a nest of dust, sweat, oil, dead skin and bacteria that damages skin and hair. The presence of dust worsens allergies and makes breathing difficult.
Good hygiene helps prevent skin problems and allergic reactions. Washing the cover is not the same as the filling and each type of pillow requires a different way of washing. The frequency depends on how dirty they get, how often the covers are washed, and whether the person is allergic, especially to mites. It is advisable to wash your pillows once or twice a year.