a few questions on my VFT

hey guys just wanna sk a few questions.

these few days, its been raining heavily and theres not much sunlight, perhaps only about 2 hours of sunlight a day. is it still okay to leave my VFT with the water tray outside in the rain? im worried of root rot.

another thing, how come when i water the vft, when water touches the traps, it closes?!

btw, how often do you malaysian VFT owners water your VFTs?

im sorry for asking such peculiar questions but yeah. hope you guys can explain this