I was involved with The Way for several years and I've been out for several years now. Looking back, I think that discussions regarding doctrinal differences between Way beliefs and mainstream beliefs did more to strengthen my resolve than dissuade me. But, everyone's experience is unique so there's no absolute method I know of.
I, too, was in a program that involved living with other Way people who had a similar level of commitment. Our main focus was to live a Way-prescribed lifestyle, recruit new members and support our efforts by working at secular jobs. In essence, it was what most people would call a commune. It was a religious commune,not the hippie, drug centered kind that's been portrayed by Hollywood movies and such.
One of the key methods that was used was isolation/insulation from outside influences, including family and non-Way friends. This was much easier to do back in the 1970's when I was involved. Other than time spent at our secular jobs, we had very limited contact with outside sources. We had no T.V.s, no phones, no newspapers. To be honest, there was not much free, personal time that could have been given to such things anyway. (Our sleep allowances were limited to about 5 hours a night.) The world has changed dramatically since then. People on the other side of the globe know instantly when you put mustard on your hot dog instead of ketchup. Well, maybe not that extreme but, the internet has certainly made it much, much harder to keep followers in darkness.
As others have said, keep the lines of communication open, let them know you care, and be patient. Everyone leaves when they're ready to leave, sometimes even sooner if they toss you out on your ear in the middle of the night. I hope we can answer any questions you may have. We will certainly try.
edit: spelling