Carpets should be professionally cleaned at least once every 12 to 18 months, depending on various factors such as foot traffic, pets, and the presence of allergies. Regular professional cleaning not only enhances the appearance of carpets but also improves indoor air quality by removing allergens, dust, and dirt deep within the fibers. High-traffic areas may require more frequent cleaning, while households with children or pets may benefit from more frequent cleanings to address stains, odors, and potential allergens. It is important to consider the manufacturer's recommendations for specific carpets and warranties, as some may require more frequent cleanings to maintain their quality and longevity. Overall, scheduling periodic professional cleanings will ensure a cleaner, healthier, and more durable carpet.