The answer to 'why is my carpet filthy' is that there are several common causes, including heavy foot traffic, pets, spills, and inadequate cleaning. Carpets can become soiled over time due to a buildup of dirt, dust, hair, and other debris. Symptoms may include discoloration, matting, and an unpleasant odor.
In many cases, regular vacuuming and spot cleaning can help maintain a clean carpet. However, for more extensive dirt and stains, you may need to have your carpet professionally cleaned. Professional carpet cleaners have the right equipment and cleaning solutions to deeply clean and restore your carpets.