The answer to 'air duct stain removal' is that air duct stains are commonly caused by a buildup of dust, dirt, and debris over time. Symptoms include visible discoloration or streaking in the air ducts, which can impact the efficiency and appearance of your HVAC system. The best solution depends on the severity of the stains.
For minor stains, you may be able to clean the ducts yourself using a vacuum with a hose attachment and a soft-bristle brush. Avoid using harsh chemicals or abrasive tools, as these can damage the ductwork. However, for more significant or stubborn stains, it's best to call in a professional air duct cleaning service. They have the specialized equipment and expertise to thoroughly clean and sanitize your air ducts without causing any damage.