I tend to agree, the less water thee better. However, Imo, cleaning chain, cassette and rings on the bike, takes solvent and a hose. An easy method, that produces a good result, is to place the bike on a old towel, brush the cassette, chain, etc., with liberal amounts of white spirit, backpedal a bit, let it sit and drip off, remove the towel and then hose the drivetrain. Then wipe with a rag and relube. - a bit like the old pro mechanics used to do it. On a disc brake bike, wipe the rotors with a clean rag and solvent too.