I have a very low tolorance for people that stink. I will, and have told them straight out, but I do try to explain to them that it is offensive and they have a responcibility to keep themselves clean when working in close proximity to others.
probably send a text telling them to clean up there act
Since I don't know all the factors involved with their home life, I would not be able to properly answer this question.
In a joking way but if they don't get it in a serious nice way.