I use brake fluid, pore some in let it soften it up scrape it out with a pick and small screwdriver then pore some more in till you get to bare metal, then pore some more in and let it seep under the glass, you should be able to wiggle it and lift it out. DONT thump it. once the glass is out turn it over and do the same to the top plate,,I have not broken one yet, I always hold my breath on that wiggle though...Frank

I collect anything Hyvis oils