Carpets trap dust, allergens, and dirt far more than hard flooring, which is why regular professional cleaning matters even in homes that vacuum frequently. A general guideline suggests professional cleaning every twelve to eighteen months for typical households, with more frequent cleaning recommended for homes with pets, young children, or allergy sufferers. Steam cleaning, using hot water extraction, remains the most thorough method for deep-set dirt and allergens, though it requires longer drying time than dry cleaning methods. Dry cleaning methods work well for lighter maintenance between deeper cleans and are particularly useful in commercial settings where minimal downtime matters. When hiring a carpet cleaning service, ask about the specific products used, particularly for households with pets or small children who spend significant time on the floor, since some cleaning agents leave residues that are better avoided. Spot treatment for stains should happen as soon as possible after they occur, since many common stains become significantly harder to remove the longer they set into carpet fibres.