The answer to 'pressure washer stain removal' is to use the right techniques and cleaning solutions for the type of stain. Common causes of stubborn stains include grease, oil, mildew, and built-up dirt. Symptoms may include discoloration, streaking, or an uneven appearance. Solutions can include using the proper pressure washer detergent, adjusting the spray pattern and angle, and scrubbing with a stiff brush.
For best results, start with the gentlest cleaning method and work up to higher pressure if needed. Avoid using too much pressure, as that can damage surfaces. If stains persist after several attempts, it's best to call a professional pressure washing service to properly assess and treat the issue.