Welcome to the Board, Kevin!
There were several things that made me realize the WTBTS was NOT the truth.
First out of the box, was my own personal experience with a blood doctrine change less than a year after I was baptized. I had agonized over not taking Rhogam, an immunoglobulin derived from blood which was forbidden for years, but which became one of the allowed fractions in June of 1990.
When that whole scenario shook me up, I researched some of the information Nocturne mentioned about CT Russell. Some of it was in a book I read called "Visons of Glory" which is out of print but excerpts of which can be found at www.freeminds.org
Nonetheless, I had bought into the dream of a righteous people and a paradise earth, and so I stuffed this knowledge somewhere in the far corners of my mind.
Later, when my children attended parochial school at my Catholic husband's insistence, I met godly people who were not Jehovah's Witnesses; people who lived upright lives, worshipped regularly, prayed and had prayers answered, etc., giving the lie to the Society's contention that everyone not in Jehovah's spiritual ark was wicked and almost certainly to be destroyed at Armageddon.
Then, I had a couple of instances where I felt the elders did not take the side of obvious right--which didn't involve me directly, but which affected the children of my best friend and sister-in-law.
There was the change in the 1914 "generation" teaching in November of 1995 which led me to investigate the 1914 date more thoroughly. Once I found out the shifting sands upon which that pivotal date was built, I knew that the organization was no more God's than any other religious organization. 607 BCE as the date of the fall of Jerusalem is a lie.
What might be helpful to you, if your wife has an inquiring mind at all, is to get her to do research for you in Encyclopedia's and Bible concordances in order to prove to you that what she believes is so. Because I didn't read that Nov. '95 Watchtower and think to myself, "That's odd, I think I'll go investigate," but rather filed that distrubing information with all the other disturbing things I'd heard/seen/wondered about over the years. And then an old friend expressed concern for my affiliation with the Witnesses and I became an apologist for the organization. Only thing being, the more I researched to refute orthodox Christianity, the more I learned about my own JW religion. And it wasn't pretty!
The problem might be that your wife is perfectly content with the organization right now, feels good about how belonging makes her feel special and holy, compounded by the fact that the WT Society does not encourage what it calls "independent thinking". And I agree with Nocturne that you will likely make little progress persuading her that it is NOT the Truth until YOUR WIFE is ready to make a move.
Although I got shaken up within 6 months of my Dec. 1989 baptism and finally got really agitated in 1995, it still took me until 2001 to break free of the shackles!
I wish you well.
outnfree