Snapped glow plug

[Steve1990]

Had this happen to me, thankfully with the head already off. Measured against the new plugs, how much is left in there?. If its less than 10mm id follow all the advice you've already had, and apply plenty of release spray down the hole, let it soak a good while, then use the rag, compression and heat trick.
Just be somewhere else out of the line of fire when it does go, cus it will be out of there like a bullet lol.
Ended up having to drive mine out with the aid of a narrow roll pin drive. Good luck, and keep your head down lol :-)

If you look at the glow plug theres the base of it then theres the end that glows its snapped at the joint if you know what i mean lol all the black tip is still in there going to try get it out as advised and worst case i have to take the head off.