Most carpet manufacturers recommend professional hot water extraction as the primary cleaning method for synthetic carpets. Although it’s often referred to as “steam” cleaning, there’s no steam involved. The carpet is pretreated with a detergent solution, and then a very hot rinse solution under high pressure is forced into your carpet and vacuumed out. When done correctly, this process cleans deep and doesn’t leave behind a soap residue. Quality pros charge $300 to $500 to deep clean 1,000 sq. ft. of carpet. At that price, you might be tempted to skip professional cleanings altogether and just rent a machine to clean the carpet yourself. Don’t. Or at least don’t do only that. A rented or purchased carpet-cleaning machine will remove the surface dirt. But deep cleaning to remove allergens, dust and greasy residues requires the specialized equipment and training of a pro. The best strategy is to use our DIY how to clean carpet cleaning tips most of the time and hire a professional every 12 to 18 months.