How hard I should try to remove spark plug

[esse10]

another thing that works pretty good is using black electrical tape to keep the socket attached to the extension and also you can use some tape at the end of the socket to temporarily hold the new spark plug in the socket as you put it back in the hole. Just lower it down slow and get a few threads started then pull out the extension & socket, then move the end tape out of the way and use the same socket/extension & ratchet & regularly tighten plug snug tight. then you can torque as required. I can post a picture of this if anybody wishes, I have been doing that method on all my cars for years now. Don't use the socket that has the rubber o-ring inside used to remove the spark plug because sometimes that rubber o-ring comes off and stays stuck deep in the hole and now you would be doing wasted work trying to fish that out of the hole. & I don't like putting wd40 on my new plugs either, just regular dialectric grease to keep moisture away.