My FIL has been a widower for over 10 years and he doesn't look after himself. His health isn't great and his hygiene terrible. He's got bad BO most of the time. I spoke to my husband who has a really respecting (loving but distant kind) relationship with him and can't see himself mentioning it / having the conversation. He worried that would crush him / his self esteem. I feel bad for him but someone he plays bridge with has made a very casual comment on how he should look after himself better... I think he should make an effort for the sake of his very minimal social life (and to be honest his smell deters me from spending time with him despite the fact that he's a very kind man).
Any advice on how to sensitively say that he needs to shower at least every other day?