Your carpet is the largest air filter in your home and it needs to be cleaned. We recommend cleaning your carpets a MINMUM of once a year. The EPA recommends having the carpets cleaned every six months if you have pets, children under the age of eight or spend a lot of time on the carpet. So even if your carpets appear to be clean and in good shape, keep in mind that your eyes can't see everything. Keep your family's long-term health in mind by having your carpets cleaned regularly.