The answer to 'why is my carpet buildup' is that carpet can accumulate various types of buildup over time, including dirt, dust, pet hair, and other debris. This buildup can make your carpet look dull and dingy, and it can also trap allergens and make your home feel less clean.
Some common causes of carpet buildup include high foot traffic, pets, and not vacuuming regularly. Symptoms of carpet buildup include a noticeable change in the color or texture of the carpet, as well as a musty or stale odor. To address carpet buildup, you can try vacuuming more frequently, using a carpet cleaner or shampoo, or hiring a professional carpet cleaning service.