The last study I had was with a couple. They studied for over a year and even attended meetings for a while. At the indoctrination sessions, though, they seemed to be able to see through so much of the nonsense. They really liked and respected the witnesses, but could pick apart their doctrines.
At first, I tried hard to overcome their objections. Then I started seeing that they made more sense than the dubs. They weren't even religious people and hadn't read the Bible or attended a church in 30 years. I started researching more on the internet to try and make sense of things and learned the truth about "the truth." The study continued, only I didn't try to overcome their objections. I couldn't come out to them, as another witness was going to the study with me. So I just let them fade and then I faded from the hall. They were actually still attending after I left.
I would love to talk to them and thank them, but it would blow my fade, as they are still called on occassionally.