Where is the plant? Indoors or outdoors?
What kind of water do you use?

That sometimes happens with traps if the prey was too big I find. I don't think yu should worry too much about it.

Tom

I woudln't trigger the traps. They have a limited amount of times they will spring.

Also, each Flytrap will have it's own quirks. So long as it is getting everything it needs and is still growing and doing it's thing, it is healthy.

I don't trigger them a lot.
Just occasionaly.

It's most likely that the fly was too big for the trap. If they eat small prey, then can eat several times. Here's a pic of a trap that has eaten and is ready for another meal. If the trap was much smaller, or the fly much bigger, it could only eat once.
-Don
{{gwi:561199}}