When I am done for the day I take the wheels off and radio box out.
I then spray the entire buggy down with Spray n' Wash.
Let stand for about 10 minutes rinse the buggy off, comes spotless.

I hold the rear end up and gently spray the front half of the chassis and suspension then hold the nose up and spray the rear of the chassis and suspension.

Once done I lean against the wall nose up or rear up to drain. A few minutes later or reverse the lean and let sit a bit longer.

The wheels I spray down with S n' W and rinse lighty as not to push waters into the foams. If there is mud I scrub the tread with a tooth brush, potato or nail brush, better to us the wifes or kids I don't think you want to be brushing your teeth with a dirty tooth brush.