Somthings really wrong..

[kentosaurs]

Hi guys.......Well i placed a tray in my terrarium and i manage to get humidity up to the high 80's but something is seriously wrong here.....Whenever i start cooling down the terrarium with ice bottles the humidity immediately drops a lot.......Sooo what "science" am i missing here What does cooling have to do with reducing humidity....At first i thought maybe its just a coincidence that the humidity drop the time i placed the bottle in but then i tried it out a few times and SAME results!!!! Once it even when as low as the 30's

Heres a picture when there is no ice bottles


With ice bottles..Sorry for this blur pic...Anyways the it shows the humidity is 55%


Please help....