The answer to 'why is my pressure washer grimy' is that a grimy pressure washer is often caused by a buildup of dirt, debris, or soap residue in the system. This can happen over time as the pressure washer is used, especially if it's not properly cleaned and maintained after each use.
Some common symptoms of a grimy pressure washer include reduced water pressure, inconsistent spray patterns, and visible grime or buildup on the surface of the machine. This can impact the performance and efficiency of the pressure washer, making it less effective at cleaning surfaces.