I have changed plugs in around eight different vehicles. By hand no air gun, carb cleaner soak from an hour to overnight prior to removal and after 1/4 turn, cold,warm,hot, broke approx 20% of the plugs used the Lisle tool to remove broken plugs 100% successful. Didn't see any difference in temperature of engine prior to removal. A few of the engines had plugs already broken by the owner attempting to remove them. The Lisle tool never let me down.

 

https://www.f150online.com/forums/v8...s-23-24-a.html

 

Got them changed over the weekend. Used a 1/2" Electric impact and rattled them all out. NO breakage at all. I think running some fuel treatment and getting things hot really helped out.
I also took all the COPs off the drivers-side first and soaked them in PB Blaster while taking off the passenger side. Then soaked the passenger side while taking out the drivers plugs.
The only problems I had were dirt in the plug wells and not being able to seat the socket all the way on, and the back two plugs both were taken out with a ratchet. I cracked them loose, soaked some more, and worked out with the "Two clicks out, one click in" method.

 

I used an air impact. When I returned from the parts store I started on it, about an hour and half later was up and running again. One plug tip had to be pulled but it appeared to have come apart before the change out.