Like stated, compressed air will blow out anything down that hole. So no need to grease or glue a fishing rig to get all of that out. 100psi does wonders for cleaning up.
What was the torque setting? Like stated, I can bust a plug with the best of them and a slight angle loaded on the porcelain will snap the plug. But to torque that thing to break, now I wonder how much thread pull you made with the pounds setting? You can just take the wrench and socket and break that plug body clean off the threads and she should spin right out you twisting the extension once the threads tell you things are fine with a hand spin; not a wrench with you sweating on the pull you need two hands to lefty loosea is the head is junk now and needs a tap, and/or thread insert.
Bottom line, you want the old plug to hand spin out, a clean area right before you remove the last 2 threads out of the hole is spray air one more time to blow out anything left behind. Nothing needs to fall in the plug hole and to make sure you did not mess the threads up. You should be able to take a rubber hose and press down over the porcelain's body. Now you hand spin the plug in till it bottoms out; torque to spec @ 115 inch pounds (13 N-m).
Book's Caution!: "The insulator of the spark plug may break if when the wrench is inclined during tightening."
I'm like blue with hand tightening, but that takes some experience to know when to stop turning, feeling about 9 foot pounds or less is about as tight I want to load on those fine threads.
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