This x 100% . Add the human touch to your approaches people. We all have issues, some worst than others..Sometimes it's best to let someone know because maybe they do care about their personal hygiene, but just didn't realize there was a problem. I would be thankful, at least.
I'm pretty sure it's in the handbook that you can't come to work drunk or high, but in this case it's hard to tell if he's been drinking or it's a last night thing. It does also address proper hygiene, and smelling like you spent the night in the drunk tank would likely violate that, even if you can't tell for sure if they're actively drunk.They always said that they can't do shit for stuff they do outside of work.