This “waterless” wash promises quick cleanings—no hose, bucket of water or sponge required. The citrus-based fluid cuts through grime and the special formula is supposed to surround and isolate dirt particles so they don’t scratch your bike’s finish. The Prolong product proved effective and got the job done fast enough that we didn’t mind using it every time we came off track. Just spray it on and wipe off with a clean cloth. The pleasant-smelling juice worked to remove brake dust, road grime and fingerprints, although it had a tough time slicing through splattered chain lube. Good old WD-40 is still your best bet for that.