My general rule is to never ever touch the inner membrane. Just keep the damp paper towel with it, and wait until tomorrow. If tomorrow it's still not making any progress, I'd say cap it like in my original post. Just don't touch the inner membrane (The clear one with veins). And make sure only to cap the air cell and no lower!!
I'm sure lots of people would disagree with my methods, but I prefer to guve them a chance rather than let them just die in the shell!