I recently (a month ago) used FW exit in my 125, only dosed it at half the recommendation and siphoned out all the dead/dying FW I could see. Might be a coincidence, but both of my rbta's split within a couple of days of this. Strangely, they went from 2 to 5 clones. They're doing fine now, but I've found that they usually split when they're annoyed.