I think my grandparents smoke around my daughter (she is 3 months old). She has only been to their place 2 times (overnight) and I was worried that they didn't seem too concerned about it when I asked them to wash their hands and smoke in another part of the house. Then when we picked her up the 2nd time my SO said my grandpa had a smoke in his hand when he said goodbye to her and it looked like he was trying to hide it from us behind his back. They love her and I don't want to keep her from them, but I don't know how to approach it after already asking them not too. Any advice?