There is no one fix for all situations Terry.
What I do recommend is you keep to prespraying (whatever it takes), aggitation, and rinsing with just clean water.
Carry various spotters for the bits that dont come out with the prespray.
and I agree with what Richard said earlier re pressure and the wonderwand. Due to its technology, you do need to run at higher pressure (or so I was told)
I had a winderwand with my CFR500, and I used it at 500psi, but the water was being recycled in that machine so usage (topping up) wasnt an issue.