"Do you clean them with Mobile Fidelity fluids? If not - you must. That's the ticket."
I know some with top notch systems, that use VPI cleaning fluid. I use RRL/MFSL, and it is a good product, but I would be shocked if it eliminated your surface noise after cleaning w/ the VPI cleaner. I would call MD, before changing to MFSL cleaning solution. I would only try new copies of your Sinatra and Cars titles if they agree to pay return shipping for the new copies and your current copies. This, in the event that your replacement copies are bad.