I wouldn't really use water and soap to do that.
Chuck the chain in a Jam jar full of isopropyl alcohol or petrol if you're feeling adventurous, screw the lid on and shake it.
(
Slippery Mick ‏, Fri 19 May 2017, 18:10,
archived)
Fenwicks is good, plus less likely to take your face off
(
drimble he'd been white, he'd been black, Fri 19 May 2017, 18:18,
archived)