I see they’re pointed. You wouldn’t be able to use a straight cut to separate them. You’d have to use a zig-zag path to separate the teeth, leaven leaving the ends pointy. If that one tooth is subject to resonance, then perhaps you should separate that one last. Or first? Marginally change it’s length?
It’s a cute design; I’d like to think there was a “Production Engineering” solution to the high failure rate.