Stuck/Tight Ferrite Cores Service Chemical Suggestions

I was wondering if there are any newer approaches to this subject since I used to be do service. Forms have changed in newer sets instead of waxed paper forms or polypropolyne Toko types. Even those had a tendency to stick and for a while the importers were using that shellac-like glip-something that acetone worked for. The waxed sealed ones, scooping out as much as you could followed by a tiny drop of xylol or heating slightly (not together) usually did the trick softening the rest of the wax without any problems to the core or form. For tight cores, a tiny drop of silicone oil using a needle dispenser often did the trick if it wasn't too wedged.



Silicone oil apparently is something that's fallen out of fashion and almost verbotten in industrial settings due to resistant contamination.



Not many real resources left on repair and I'm curious what's used today.



I realize this board has descended into a drive by newB board, but any of you still doing real service? I'm curious what service chemicals have replaced the old. A look at sources reveal all sorts of new products that I'm unfamilliar with and many of the well know, old, effective products for one enviormental or hazmat reason have vanished especially in the last decade or two.



Anyone can give any suggestions