Also, i had a problem with this a while ago like 2 weeks back. what i did was soaked him in lukewarm water and got an old (But Clean!) toothbrush, that had soft bristles. I rubbed his head gently backwards and it came off great. if u move slow they don't mind much. My BP is cool with me touching his head, as long as i move slowly. Hope this helps. GL!
P.S i would use the previous suggestions first. this is in case those dont work.