Cant get my poo to harden

I have had crohns for two years and lately I cant get my poop to harden. I have a colostomy and this morning I woke up and the bag exploded and I was covered in poop. I have been trying to eat things that are known to make your poop harder such as bananas, marshmellows, pasta. I am also on remicade and after a session I am usually doing well but this last time didn't seem to do anything to help my poo. Do you have any suggestions to get my poop to harden up.