Been using 99% isopropyl (IPA, not from the local brew pub).
A 3.5mm Maury sliding load/termination had enough of that same foam residue that it would not slide across it's range. The supplies below (aerosol IPA and foam-tip swabs, along with a very fine tipped tweezers to pluck out anything that could be plucked) together all got the sliding load back to normal motion.
MG Chemicals 824-450G as an aerosol (not push-pump) packaging I've found is really handy for detail electronics cleaning (just IPA, but in a propellant spray can.)
Foam-tip swabs (like those used for cleaning fiber-optic connectors during field installation, cheap by the pack of 100) with either rounded (2.5mm) or pointy (1.25mm) tips are also helpful to reach in around the male pin and internal shielding. The female pin end I think only can be cleaned by IPA, that's where delivering via spray is handy.
Dave
