Ok, so I fed my VFT, which I named, I call him Vinny. I fed him a cricket and now that stem is blackened and appears to be dying. I've been watering it with distilled water and he sits on the back of my toilet in the bathroom- he really loves all the moisture that he gets from the shower. I just don't understand why this leaf would've died after I fed it. I didn't force it upon him or anything. What went wrong? How can I continue to help him grow?