My 4-year old has decided he no longer wants to say "hello" "goodbye" or "thank you" to people who come over. Most recently it was yesterday, when my mother in law was taking care of him while he was home sick. He wouldn't give her a hug, say goodbye or say thank you when she was leaving. But it's par for the course for him. It's really disturbing to my DH and I because we've really worked hard on the kids' manners and I just don't want him to a) be rude and b) frankly, have it reflect on us as if we aren't teaching our kids manners. Has anyone else successfully dealt with this in a preschooler? It used to be no problem and our 2-year old loves hello and "bye bye" and says thank you all the time. It really bums me out.