How did the Fuller clean his cloth?

Fullers cleaned cloth by a process called "fulling," which involved soaking the fabric in water and using a mixture of natural substances like urine, clay, or soap to remove impurities and oils. The cloth was then beaten or stomped to help the fibers mat together, making it thicker and denser. Afterward, the cloth would be rinsed and stretched to dry, resulting in a cleaner and more durable fabric ready for use. This method was essential in the textile production process during ancient and medieval times.