So ive been using the fentanyl patches recently. I know they are very dangerous but im in a lot of pain and its the only thing that helps. I ussualy suck on them for faster relief. I know its not a good idea but i still do. What i want to know is if i take the patch out before its conoletely used up if i can store it in something and use the rest the next day or does it go bad after getting wet from salivia then drying out?