I have "Pressure Cleaning" in the name of my business but I seem to use "Pressure Washing" in most all of my advertising. I do however throw "Power Washing" in there once in awile to mix things up a bit just in case. It's really hard to figure out just what exactly folks are gonna use for key words when doing a search for service. I've asked a few on occation and they always seem to say "Pressure Washing". It seems to be the most popular IMO.