The answer to 'air duct cleaning stain removal' is that stains in air ducts are typically caused by a buildup of dust, debris, and even mold or mildew. Symptoms can include visible staining on the ductwork, musty odors, and potential health issues for those with allergies or respiratory conditions. The best solution depends on the severity of the stains.
For minor stains, homeowners can try DIY duct cleaning using a vacuum with a hose attachment or a duct cleaning brush. However, for more significant staining, stubborn buildup, or concerns about mold, it's best to call in a professional air duct cleaning service. They have the specialized equipment and expertise to thoroughly clean and sanitize the ductwork, removing all traces of stains and contaminants.