We stopped turning in a service report last summer after the convention. Before that I had been actively researching our religion (we were both raised-in) and I was having doubts galore.
In hind-sight we were personally questioning things for a couple of years - and this was creeping into our conversations at the door. And we began the habit of just 'working' in service as a couple - no swapping out or going in different car groups.
We used to use all the stock responses to objections - cherry pick the scriptures and use plenty of Watchtowerisms. We were considered in the congregation to be good in field service - with plenty of positive return visit experiences.
I found myself 'listening' to the person - what they were really saying, what scriptures they were using as a basis for their belief. I also began to engage in real conversation - admitting that Jehovah's Witnesses don't have all the answers.
ginger