My VFTs are doing pretty good for my first time growing them, I think. *They are bright green and have plenty of new traps sprouting now. *I just put an occassional fly or cricket (store bought) in the terrarium (enclosed) and let the trap naturally catch them. *Two of my traps have caught insects (one fly, one cricket) with the insects sticking out of the trap a little. *Now they are turning black with the insect as the origin. *Why are the traps dying too? *Is there some way to prevent this? *Thanks.