Do you feel bad air quality when you get inside your home? Do you frequently cough or sneeze? Have you spent hundreds of dollars to see the doctors? Maybe you just need to get your air duct cleaned properly because bad air quality usually causes such health-related issues. There could be thousands of bacterias, germs, mites, rodents, or insects inside your heating and cooling system. These little devils could make the air quality unhealthy and cause allergic reactions.