OK so I have a friend who spent a lot of money on a smoker but refuses to learn how to use it. He always invites my wife and I over for BBQ's and I always lend a helping hand. Sometimes I help cook sometimes I just offer advice. We always have a good time but my wife hinted that it may be rude to go to someone's house and tell them how to cook. I know you have been in this situation once in your life what would you do?