The answer to 'pressure washer filthy' is that a dirty pressure washer is often caused by a clogged nozzle, build-up of dirt and debris, or worn parts. Symptoms include reduced water pressure, uneven spray, and poor cleaning performance. Solutions include cleaning the nozzle, flushing the system, and replacing worn components like the pump or hose.
For minor issues, you can often clean and maintain your pressure washer yourself. However, for more complex problems or if you're not comfortable performing repairs, it's best to call a professional cleaning technician to diagnose and fix the issue.