[Jack in Alaska]

My 2004 MS has the Never-Lube hubs. THe RV has approx. 40k miles on it. I had the hubs taken apart at a RV shop in 2009 for a check. They called the factory to check on the "play" in the bearing pack and were told that mine were in specs. I watch them carefully for leaking and check them with a infra-red thermometer at most stops along the way.
Now I read about others who have taken the same precautions and more but still have unbelievable problems.
What can be done to eliminate that. All of my previous RV's had conventional bearings/seals that I repacked each year. Never had a problem. I am really apprehensive about my Never-Lubes.
Anyone have a solution???????