cyccommute, thanks, I understand and will try it -- with one caveat: the water dishwashing detergent is really just a simple, cheap method meant to remove the heaviest part of the caked on limestone dust and grit that is clinging to the chain. I could try to brush it off or wipe it off -- and I do that in between removing the chain for a thorough cleaning. But it's a lot of work without much benefit. So instead I simply dump the chain in a bucket with about 3 inches of water and detergent, swish it around a bit then change the solution once it is black. After the heavy, clingy stuff is gone, then I use an organic solvent. But your point about using a non-polar organic solvent is a good one. Thanks!