Journeyman
"And this one is just right" ~ Goldilocks
I'd heard about these foam canons and thought I'd get one for washing the RV. Works great on the Roadster too! They're about $20 and attach to your pressure washer- no, the force coming out isn't that strong, at least on my cheap-o washer, safe to use everywhere. It helps getting soap into those harder to reach places and sits there for a while. Same scientifically proven principal that says you should leave the dishes soaking overnight
You still have to put your elbow into it with a cloth if you haven't washed in a while, but I think it does a pretty good job of making the job a little easier.

You still have to put your elbow into it with a cloth if you haven't washed in a while, but I think it does a pretty good job of making the job a little easier.