There are plenty of chain cleaning threads on NR... this is sort of another one - but just wanted to share a couple of home made aids to help with the process. Here's my homemade grunge brush: I couldn't be bothered making a wood block wedge, so with some rags and gaffa a homemade grunge brush was born! I dip the brushes in kero and give the chain a scrub-a-dub-dub. It really gets the grime out of the chain. I scrub a section at a time then vigorously rub with a rag till the chain is basically dry. Then once the chain is clean and any remaining kero has had time to weather off (compressed air helps), it's time for a decent lube and soak... I use Motul road as my chain lube of choice - it's light and penetrating and fling off is miniscule. I slip a piece of cardboard in between the chain and the wheel (there's a small cut out to suit the wheel hub) to protect the tyre from getting coated. After the lube has had a chance to soak in, I give it a quick wipe with a rag to remove any excess. ...and vuola - one clean and lubed chain. 38000 km and the chain still has plenty of life left.