A few weeks ago, I bought my first pressure washer. A Ryobi unit for $100. Never had one before. Never used one before. I moved into my house in '02, and didn't realize until now how much it needed it.

I spray with the max pressure nozzle on the sidewalk, and now it's changed color.

I spray my brown/green stained wooden stairs to my garage, and now they are the original wood color.

I spray the awning(lower pressure) of my house, and it was raining dirt & moss. Some paint came off down to the fiberglass, but I'm going to repaint it anyway.

The difference is truly night & day.

I think the water runoff to the lawn has made the grass grow better too.

The top of the stairs was a combination of black & brown colored before I pressure washed it.

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I'm at 1600 PSI(or was it 1900?). I can't imagine needing any more pressure, for it would start to damage to the house instead of cleaning it.