Well for the first time in a long time my male BP is feeding every week. I figured out a trick that works at least for him (who has gone over 6 months at times without feeding).
1. I'll scent the room by the leaving the dethawing rat in the room with him for at least an hour.
2. Feed at 9pm or later.
3. When I feed him I leave all lights off, and just use a flash light to see. I make sure not to shine the light directly on him.
This has worked for the past 3 weeks and I am so happy.
Maybe we can compile a list of things that work to get a BP eating again.