Suggestion: Most cleaning products will do just fine, but will often leave a residue. It is always a good idea (after using cleaning product) to use a mild solvent like IPA, and wipe up with a clean paper towel. Rubbing alcohol ranges from 30% to 70% isopropyl alcohol and water.
Observations:
-Assuming they are clean, balls (specifically surface roughness) will still have a huge impact! The smoother balls will actually roll twice as far as a rough ball.
-The older tables had a different surface. This was changed several years ago, but Valley should be able to tell you whether you have an older or newer surface.