Ooh baby wipes according to AndyB!
Personally I use soapy water and a sponge.Never use a hose,ya just dont know where all the water is going.
Car shampoo's are best.Dont get too much water on the sponge then dry it off with a clean dry cloth.(Old tee shirts are good for this)
I'll then use and aerosol polish like the Motrax stuff to finish.
I usually clean the wheels and any stray oil or grease with WD40.