Carpet care can be narrowed down into three areas: The first is daily care, which mostly involves vacuuming and prompt treatment of spills and spots. Secondly, the interim cleaning or the regular cleaning that takes place. Most of the carpet manufacturers recommend professional cleaners be contacted to do this cleaning. It is possible for the consumers to do it themselves by renting a Rug Doctor machine or things like that. Many of the carpet mills will certainly not void any warranty for that, but their recommendation is professional cleaning on an average of once a year. The reason I say average is that EPA tells us if there is a smoker in the house then they should clean it twice as often because of the residues. If there is an ill person in the home maybe even more frequent than that, but average is annual. Pay attention to the warranty requirements: for example, Stainmaster carpets require that they clean it every 18-24 months so that the warranty won't void. Professional cleaners would be able to recommend the appropriate method and type of cleaning for that condition, because not all carpets are cleaned by the same system. Wool carpets require different care than nylon carpets, which require different care from synthetic carpets. The consumers need to have that kind of confidence and if you look in most of the consumer care brochures passed out by people like Mohawks or Shaw, it would have the IICRC referral number as a resource to find a professional cleaner.