I've noticed that when it rains the rain drops trigger my plants traps close then they continue to fall through the closed traps and stimulate the trigger hairs,thus causing the traps to seal shut and start the digestion process...days later these traps open,having closed up for no reason. LOL i have to laugh when this happens-it seems the vft is not as perfect as it seems,as this glitch is really very funny...don't u think?