Usually, I just wipe the frame down with a cloth sprayed with Lemon Pledge, degrease the drivetrain parts, wipe them off, and lube the chain. If the bike's gotten muddy, I'll use the "shower" setting on my hose nozzle for the frame and wheels, then wipe and polish with dry rags. If you get in the habit of giving it a five-minute wipe-down after every couple of rides, you'll rarely have to deal with a major cleaning.