Reasons why to get cleaning: Contributes to a healthier environment. Carpet is the biggest filter in your entire home, and it filters out all sorts of airborne pollutants such as dust mites, dirt, fungus, asphalt, and pollens. Eventually those pollutants must be removed in order to protect the carpet and maintain indoor air quality (just like when you replace the filter in your HVAC system). Indoor air quality is a major issue, especially if you suffer from asthma or allergies. The high temperature of the water used by carpet cleaning professionals kills off these allergens so that they are no longer a health threat and leaves the surface of the carpet sanitized.