OK, I've read all the posts, I watched the videos but I have a couple of questions:

Some people say the engine should be warmed a little, some say it should be cold. I am in Michigan, so cold so cold won't be a problem! Just want to make sure to do it the best way.

I have been running combustion chamber cleaner in for a few tanks now to help as much as possible...and because I was going to do it myself, then I decided to have the Ford dealer do it until they wanted $95 a plug for each one that broke! Now I am doing it myself!

Does using an impact wrench (I have a Rigid 18v) to loosen the plugs help?

Lastly...Gumout (carb cleaner) or PB Blaster?

Any help would be great!

PS - Makuloco200...great videos