Carpets should be professionally cleaned every 6-12 months in Oregon homes, with frequency depending on foot traffic, pets, children, and Pacific Northwest weather conditions. According to the Carpet and Rug Institute, regular professional cleaning extends carpet life, maintains appearance, and removes embedded allergens that vacuuming cannot reach. Oregon’s rainy climate means homeowners track more moisture and outdoor dirt indoors compared to drier climates, making professional cleaning more important. Homes with pets should schedule cleaning every 3-6 months, while households with allergies or asthma benefit from more frequent cleaning removing dust mites, pollen, and pet dander. High-traffic areas including entryways, hallways, and living rooms may require more frequent attention than bedrooms or formal dining rooms.