I hear ya! My Bee had been off since December...after doing everything I could think of (smaller enclosure, various rodents in different states animation, etc), I just stuck a f/t asfr in his hide with him and planned on leaving it overnight really expecting it to still be there in the morning. Lo' and behold, it was gone when I checked in on him a few hours later...and he's been on ever since (3 weeks in a row now)!
I'm actually kinda relieved to experience such a long fast this early in my keeping career...less to stress about later on when any one of them goes off again in the future...if I can survive 6 months, I can survive anything...unless one goes off for a year...lol