Well, for the first time today I used the Sheldon Shake method to clean my chain. It's been the first time it was practical, as I've only recently got a SRAM chain with a Powerlink. Probably the first thing I learned was that you should only do it with a plastic bottle with a fairly wide neck. I ended up having to cut the bottle open to remove the chain as it had wound around itself and the neck wasn't wide enough to admit a doule thickness of chain. However - I now have a question: can you reuse the white spirit? I have saved it all in a tub and I'm hoping I can leave it to settle and then filter the rest with coffee filter paper or something when I next need to use it. Apparently white spirit is rather environmentally unfriendly and you shouldn't flush it down the drain. (As well as harming aquatic animals if it gets into rivers or the sea, apparently it's not very good for the bacteria they use for treating sewage) What do other people do with theirs?