cleaning dow corning high vacuum grease

[cyclemax]

Just wipe off as much as you can using a dry lint free wipe. Most solvents won't touch the silicone based grease. Freon TF works but you can't get that anymore. Chromic acid in sulfuric acid will work but that's overkill for your goal and you don't want to go there. The thin residue film you would leave behind dry wiping shouldn't cause you any problems.