Throw them out or live with it!!!
Not trying to be smart or anything, but that's the problem with jungle ich medication (If I'm not mistaken it's main compound is Methylene blue)
It should have turned the silicone in your tank blue as well....
You could try bleaching the decorations. Let them sit in the bleach water for a few days and see what happens, but I don't think they will come clean!!! If you do this make sure to rinse them very, very well before placing them back in the tank (if you do)
Wish I had better news for ya..........
CM