Was previously using Dumonde Tech Lite for lube and Simply Green for cleaning and it was all going pretty good. Road bike cleaning about every 200 miles. Had some ProLink that I had not used up and started using that. Am getting a thick greasey film on the drivetrain that neither Simply Green or Spin Doctor Degreaser can seem to cut. Any recommendations on how to get the current grime off and best combination of products going forward. Northern California so little riding in rain but pavement often wet from fog.

Real mineral spirits would do it. Do they still allow its sale in California?

Yup, still available here. Also dropping your chain in a jar or kerosene works well and both can be re-used by storing in the jar and letting the gunk settle to the bottom. Make sure you don't get the "environmentally GREEN" mineral spirits as it's a completely different concoction, is corrosive to steel and isn't all that green in practical use.

I agree that mineral spirits or naphtha will work as a cleaner, but I'd use it in small quantities and discard. Normally uou can save, settle and reuse these solvents, but you've created a soup of water and oil blend, plus the plasticizer in the Dumond, so you ant to get rid of it.

BTW- the reason you made this mess is probably because you inse and dry the chain properly between the wash oil cycles. The cleaner mixes with the lube forming a sludge or soap like material, which you left inside, then you madeit worse by adding more oil and petroleum solvent.

In the future, treat washing a chain as you would washing a cat. Do it only when absolutely necessary, and when you do, do it very carefully.

Now THAT is one of my favorite quotes of 2013!