I found a bug. If someone starts to regenerate and puts their regenerations into a fob watch, they still regenerate and gain -1 regenerations. But the problem is that they can refill a fob watch as long as it has 1 regeneration in, and the regeneration lowers such as:  -1 [ Hasn't Refilled], -2 [Refilled 1 regeneration in a fob watch], -3 [Refilled 2 regenerations in a fob watch], etc... This can be used to refill fob watches with at least 1 regeneration in. Here's a video showing this: https://www.youtube.com/watch?v=kRHVwvoze0g&feature=youtu.be 

 Woah, that is huge especially because they try to prevent that, thanks for your co-operation. I will forward this to a developer.