Thats a tough one, but I do not think you should tell him, maybe he might get offended despite the fact that he does have a problem, I would suggest writing a note and make it straight to the facts and not in a insulting way.

not insult him. just tell them of hygeine and shower time importance. to be smelly is hurtful for jobs and friends

yes,don't insult him.This can hurt him.Just discuss politely about his problem in a sepearte place .He might have any other problem for bad odor.Treat him in this way that he does not misunderstand you.

what me and my mates did was just to say he smells but in a jokey way. he didnt think we were serious but he understood what we were saying and now doesnt smell at all

Fucking asshole who insult people that smell...I got that fucking problem..Meh, But im sorted now..All that person needs is a good shower every day or bath doesn't matter aslong as it is hygenic and they put of deodrant when they go out then he shouldn't smell bad at all..

yeh everyone probably smells at some point but all the time it gets too much. especially when something can be done about unless there is a medical condition which we know he hasnt go