Where dust comes from may shock and horrify you, so are you really ready for the answer? No? Well I’m going to give it to you anyway. Dust is primarily made up of dead human skin cells that you have shed and tend to gather together on surfaces. Often your in-laws love running their fingers along you knickknacks and telling you how filthy they are, and that you should be ashamed, but if they only knew how filthy it truly was! Dust can also consist of pollens, animal dander, fibers from clothing, carpet, and everywhere else under the sun, and of course is home to tiny creatures called dust mites.