Mine had split many times and if they get in a spot where I can get my hand I gently massage and use my finger nail under their foot to free them. Sort of like peeling gum off. Just go slowly and once you have gotten under their foot just slowly massage the rest of it off. They shrink down to nothing in size. The hard part is if they attach to a place you can't reach. I have some that the foot is attached to the back of the rock.