The answer to 'why is my pressure washer dirty' is that there are several common causes, including buildup of dirt, debris, and chemical residue from previous use. Symptoms may include reduced cleaning power, streaking, and discoloration of the water.
To troubleshoot and clean your pressure washer, start by disconnecting the hose and nozzle and inspecting them for any blockages or damage. You can try flushing the system with clean water and a mild detergent solution. If the issue persists, you may need to disassemble the pump and clean the internal components. For more complex problems, it's best to call a professional pressure washer technician to diagnose and repair the issue.