I quit drinking alcohol cold turkey more times than I can count in the course of my drinking career. Ultimately, after a period of time I always found a reason to drink again.
I finally discovered that I needed to make changes in me, quitting drinking alone wasn't enough to stay sober in the long run.
Drinking vodka by yourself, hiding it from your wife, and sometimes drinking in the morning are all things I did. Your body can't keep up with the physical abuse as you age. This is not likely to end well.