The balls on my LOTR keep getting all cruddy. It can be scraped off with your fingernail. I'm the original owner and it has always been doing this. I've shopped the game out over the years and changed to white rubber. Used all kinds of balls and keeps happening. Does not happen to any other of my games.
These balls were put in few months ago and maybe 50 plays. After cleaning and playing a couple of games you can see some spots of the crud coming back!
Second picture are the same balls cleaned with novus 1.