What is dust made of? Do you really want to know? Dust can be everything from dead skin cells (up to 90% could be dead skin cells), pet dander, dead insect parts, dirt and other things that you really don’t want in your house. Now what? Have you had your air ducts cleaned this year? Companies like Universal Duct Cleaning offers air duct inspections and air duct cleaning in Virginia Beach, Chesapeake, Newport News and surrounding areas.